pacemaker device /7/Machine/Kinds/Electronic/pacemaker device
pack ice /5/Earth Science/Water/Fresh/Areas/Ice/pack ice
packet switching /3/Computer Science/Software/Coding/Methods/packet switching
packthread /7/Machine/Parts/String/packthread
paddle tennis /7/Game/Athletic/Racket/paddle tennis
paean /2/Literature/Prose/Kinds/Essay/paean
pagination /7/Machine/Kinds/Printing/Page/pagination
paint /7/Machine/Industrial Materials/Organic Chemical/paint
palate /4/Zoology/Organ/Digestion/Parts/Mouth/Pharynx/palate
paleocortex /4/Zoology/Kinds/Reptile/Anatomy/paleocortex
paleontology /4/Biology/Subjects/Evolution/paleontology
palette symbol /6/Linguistics/Writing/Symbol/Pictogram/palette symbol
palimpsest /7/Machine/Industrial Materials/Organic Chemical/Paper/palimpsest
palindrome /2/Literature/Prose/Expressions/Letter Combinations/palindrome
palisade, cliff /5/Earth Science/Land/Land Forms/High Area/palisade cliff
palmar /4/Zoology/Organ/Skeleton/Bones/Extremity/Arm/palmar
palmistry /4/Biology/Subjects/Animal/palmistry
palsy /4/Medicine/Disease/Kinds/Organ/Nerve/Muscle/palsy
pampas /5/Earth Science/Land/Land Forms/Vegetation/Grass/pampas as plain
panchromatic /7/Machine/Kinds/Optical/Film/panchromatic
pancreas /4/Zoology/Organ/Digestion/Parts/Pancreas/pancreas organ
panic /6/Psychology/Cognition/Emotion/Kinds/panic
pantheism /6/Religion/Belief/pantheism
Pap smear /4/Medicine/Medical Examination/Tests/Women/Pap smear
paperback book /7/Machine/Kinds/Printing/Book/paperback book
papilla /1/Consciousness/Sense/Taste/Anatomy/Tongue/Papilla/papilla
papyrus /6/History/History/Invention/Asia/Middle East/papyrus
par value /6/Economics/Microeconomics/Finance/Securities/Value/par value
parable /2/Literature/Prose/Kinds/Story/parable
paradigm, perception /6/Philosophy/Epistemology/Perception/Paradigms/paradigm
paragraph symbol /6/Linguistics/Writing/Symbol/Punctuation/paragraph symbol
parallel axiom /3/Geometry/Kinds/Projective Geometry/parallel axiom
parallel circuit /5/Physics/Electromagnetism/Circuit/Loads/parallel circuit
parallel postulate /3/Geometry/Plane/Line/Axiom/parallel postulate
parallel processing /3/Computer Science/Systems/parallel processing
parallel transport /3/Calculus/Vector/Operations/parallel transport
parallelepiped /3/Geometry/Solid/parallelepiped
parallelism, writing /6/Education/Writing/Grammar/parallelism in writing
parallelogram /3/Geometry/Plane/Polygon/Kinds/Quadrilateral/parallelogram
paralysis /4/Medicine/Disease/Kinds/Organ/Nerve/Muscle/Paralysis/paralysis
paramagnetism /5/Physics/Electromagnetism/Magnetism/Kinds/Paramagnetism/paramagnetism
paranoia /4/Medicine/Disease/Kinds/Organ/Nerve/Mental/paranoia
paraphrase, literature /2/Literature/Literary Techniques/paraphrase
paraplegia /4/Medicine/Disease/Kinds/Organ/Nerve/Muscle/Paralysis/paraplegia
parapsychology /6/Psychology/Parapsychology/parapsychology
parasitism /4/Ecology/Community/Species Relations/parasitism
parasitology /4/Biology/Subjects/Medicine/parasitology
parasympathetic autonomic system /4/Zoology/Organ/Nerve/Systems/Function/parasympathetic autonomic system
parathormone /4/Zoology/Organ/Endocrine Gland/Hormone/Calcium/parathormone
parathyroid gland /4/Zoology/Organ/Endocrine Gland/Glands/parathyroid gland
parentheses /6/Linguistics/Writing/Symbol/Punctuation/parentheses
parietal eye /4/Zoology/Kinds/Reptile/Anatomy/Eye/parietal eye
parietal lobe /4/Zoology/Organ/Nerve/Brain/Cerebrum/Parietal Lobe/parietal lobe
parity checking /3/Information Theory/Error Prevention/parity checking
parity, number /3/Number Theory/parity of numbers
parity, physics /5/Physics/Matter/Particle/Properties/parity in physics
parlance /6/Linguistics/Language/Usage/parlance
parliamentary democracy /6/Political Science/Government/Kinds/Democracy/parliamentary democracy
parochial school /6/Education/Levels/Type/parochial school
parody /2/Literature/Prose/Expressions/Humorous/parody
parole, law /6/Law/Crime/Punishment/Termination/parole of prisoner
paronym /6/Linguistics/Semantics/Word/Relations/paronym
paroxytone /6/Linguistics/Phonetics/Modulation/Accent/Word/paroxytone
parricide /6/Law/Crime/Crimes/Violent/Murder/parricide
parsing problem /1/Consciousness/Sense/Physiology/Binding/parsing problem
parsing, grammar /6/Linguistics/Grammar/Syntax/Parsing/parsing
parthenogenesis /4/Biology/Evolution/Reproduction/Asexual/parthenogenesis
Parthian shot /6/History/History/Nation/Asia/Middle East/Parthian shot
partial derivative /3/Calculus/Differentiation/Partial/partial derivative
participle /6/Linguistics/Grammar/Syntax/Noun/Verbal/participle
particle decay /5/Physics/Matter/Atom/Reactions/particle decay
partition function /5/Physics/Heat/Statistical Mechanics/partition function
partition of energy, heat /5/Physics/Heat/Kinetics/partition of energy
partition, set /3/Set Theory/Set Properties/partition of set
partnership /6/Economics/Microeconomics/Business/Kinds/Partnership/partnership
parts of speech /6/Linguistics/Grammar/Syntax/Sentence/parts of speech
parturition /4/Zoology/Organ/Reproduction/Birth/parturition
pas de deux, ballet /2/Dance/Ballet/Kinds/pas de deux
passive resistance /6/Law/Person/Rights/passive resistance
passive voice /6/Linguistics/Grammar/Syntax/Verb/Voice/passive voice
passport /6/Political Science/International Relations/Documents/passport
pasteurization /4/Medicine/Clean/pasteurization
pastorale /2/Music/Classical/Composition Types/pastorale
patch test /4/Medicine/Medical Examination/Tests/patch test
pate /4/Zoology/Organ/Skeleton/Bones/Head/pate as head
patella /4/Zoology/Organ/Skeleton/Bones/Extremity/Leg/patella
patent, business /6/Economics/Macroeconomics/Government Actions/patent in business
paternalism /6/Political Science/Government/Kinds/paternalism
pathetic fallacy /2/Literature/Rhetoric/Fallacy/pathetic fallacy
pathogen /4/Medicine/Disease/pathogen
pathology /4/Biology/Subjects/Medicine/pathology
pathos /2/Literature/Drama/pathos
patina /5/Earth Science/Mineral/Textures/patina
patois /6/Linguistics/Language/Dialect/patois
patriarchy /6/Political Science/Government/Tribe/patriarchy
patrician /6/Law/National/Roman Law/Roman Classes/patrician
patricide /6/Law/Crime/Crimes/Violent/Murder/patricide
patrimony /7/Legal Affairs/Death/Will/Probate/patrimony
patriotism /6/Political Science/People/Feeling/patriotism
patronage /6/Political Science/Actions/Money/patronage
patronymic /6/Linguistics/Semantics/Word/Kinds/patronymic
Pauli exclusion principle, fermion /5/Physics/Matter/Atom/Orbital/Rules/Pauli exclusion principle
payola /6/Economics/Microeconomics/Production/Factors/Labor/Job/Money/payola
p-brane /5/Physics/String Theory/Brane/p-brane
pearl, gem /5/Earth Science/Mineral/Kinds/Organic/pearl
pectin, polymer /5/Chemistry/Biochemistry/Carbohydrate/Carbohydrates/Polymer/pectin polymer
pectoral /4/Zoology/Organ/Muscle/Muscles/pectoral muscle
pectoral girdle /4/Zoology/Organ/Skeleton/Bones/Trunk/pectoral girdle
pediatrics /4/Biology/Subjects/Medicine/pediatrics
pediment /2/Art/Architecture/Building Parts/Greek Temple/pediment
pedology /5/Earth Science/Land/Soil/pedology
pedometer /7/Machine/Kinds/Instrument/pedometer
pedomorphism /4/Zoology/Kinds/Mammal/pedomorphism
pedophilia /6/Psychology/Family/Sexual Actions/pedophilia
peds /5/Earth Science/Land/Soil/peds
peer group /6/Sociology/Sociological Group/Kinds/Order/peer group
pelagic /4/Ecology/Community/Food Chain/Organism Types/Ocean/pelagic
pellagra /4/Medicine/Disease/Kinds/Nutrition/Vitamin/pellagra
pelvis /4/Zoology/Organ/Skeleton/Bones/Trunk/Pelvis/pelvis
pemmican /7/Food/Cooking/Prepared Food/Meat/pemmican
pen, writing /7/Machine/Kinds/Fluid/Pen/pen for writing
penal code /6/Law/Kinds/Code/penal code
pencil sharpener /7/Machine/Kinds/Mechanical/Household/Pencil/pencil sharpener
pencil, writing /7/Machine/Kinds/Mechanical/Household/Pencil/pencil for writing
peninsula /5/Earth Science/Land/Land Forms/Shore/peninsula
penis /4/Zoology/Organ/Reproduction/Male/Parts/penis
penna /4/Zoology/Organ/Skin/Feather/penna
penology /6/Law/Subjects/penology
pension /6/Economics/Microeconomics/Production/Factors/Labor/Job/Benefit/pension
pentagon /3/Geometry/Plane/Polygon/Kinds/Number/pentagon polygon
pentagram of Pythagoras /3/Geometry/Plane/Polygon/Kinds/pentagram of Pythagoras
pentahedron /3/Geometry/Solid/Polyhedron/Kinds/Number Of Faces/pentahedron
penumbra /5/Physics/Wave/Diffraction/Shadow/penumbra
penury /6/Economics/Microeconomics/Money/penury
peptide /5/Chemistry/Biochemistry/Protein/Kinds/peptide
peptide bond /5/Chemistry/Biochemistry/Protein/Chemical Reaction/peptide bond
percent symbol /6/Linguistics/Writing/Symbol/percent symbol
percentile /3/Statistics/Statistical Population/Percentile/percentile
perception /6/Psychology/Cognition/Perception/perception
percuss /4/Medicine/Medical Examination/Parts/percuss
percussion instrument /2/Music/Instrument/Categories/percussion instrument
performance /6/Law/Contract/Enforcability/performance in law
pericardium /4/Zoology/Organ/Circulation/Parts/Heart/pericardium
perineum /4/Zoology/Organ/Digestion/Parts/perineum
period, oscillation /5/Physics/Dynamics/Force/Kinds/Restoring/period of spring
period, vibration /5/Physics/Kinetics/Motion Types/Vibration/period of vibration
periodic table /5/Physics/Matter/Atom/Periodic Table/periodic table
periodicity /3/Computer Science/Systems/Chaos Theory/periodicity in systems
periodontics /4/Biology/Subjects/Medicine/Dentistry/periodontics
peripheral nervous system /4/Zoology/Organ/Nerve/Systems/Location/peripheral nervous system
peristalsis /4/Zoology/Organ/Digestion/Movements/peristalsis
peritoneum /4/Zoology/Organ/Digestion/Parts/Small Intestine/Connectors/peritoneum
peritonitis /4/Zoology/Organ/Digestion/Parts/Small Intestine/Connectors/peritonitis
permafrost /5/Earth Science/Planet/Climate/Kinds/Latitude/permafrost
permanent magnet /5/Physics/Electromagnetism/Magnetism/Kinds/Ferromagnetism/permanent magnet
permanent tooth /4/Zoology/Organ/Digestion/Parts/Teeth/Kinds/Age/permanent tooth
permanent wave /7/Personal Affairs/Hair/permanent wave
permeability, magnetism /5/Physics/Electromagnetism/Magnetism/Permeability/permeability of magnetism
permeability, soil /5/Earth Science/Water/Fresh/Soil/Spaces/permeability of soil
permittivity /5/Physics/Electromagnetism/Conductivity/Insulator/permittivity
permutation /3/Statistics/Events/permutation in statistics
pernicious anemia /4/Medicine/Disease/Kinds/Nutrition/Vitamin/pernicious anemia
perpetual motion /5/Physics/Heat/Thermodynamics/perpetual motion
perseveration, behavior /4/Medicine/Disease/Kinds/Organ/Nerve/Mental/perseveration
persiflage /2/Literature/Prose/Expressions/Humorous/persiflage
personal autonomy /6/Education/personal autonomy
personal income /6/Economics/Macroeconomics/Measurement/Measure/personal income
personal service corporation /6/Economics/Microeconomics/Business/Kinds/Corporation/Kinds/personal service corporation
personality /6/Psychology/Personality/personality
persuasion /6/Psychology/Behavior/Kinds/persuasion
pestilence /4/Medicine/Disease/Widespread/pestilence
petal /4/Botany/Plant/Vascular/Angiosperm/Flower/Parts/petal of flower
petit jury /6/Law/Trial/Jury/Kinds/petit jury
petrified wood /4/Botany/Plant/Vascular/Parts/Wood/petrified wood
petroglyph /6/Linguistics/Writing/Alphabet/Units/petroglyph
petty larceny /6/Law/Crime/Crimes/Theft/Larceny/petty larceny
phagocyte /4/Zoology/Organ/Blood/Parts/White Blood Cell/phagocyte
phagocytize /4/Zoology/Organ/Blood/phagocytize
phalange /4/Zoology/Organ/Skeleton/Bones/Extremity/Arm/phalange
phantom limb /1/Consciousness/Sense/Pain/Kinds/phantom limb
pharisee /6/Religion/Religions/Christianity/People/pharisee
pharmaceutics /4/Biology/Subjects/Medicine/pharmaceutics
pharmacology /4/Biology/Subjects/Medicine/pharmacology
pharynx /4/Zoology/Organ/Digestion/Parts/Mouth/Pharynx/pharynx
phase space, system /3/Computer Science/System Analysis/Phase Space/phase space of system
phase, chemistry /5/Chemistry/Inorganic/Phase/phase of substance
phase, vibration /5/Physics/Kinetics/Motion Types/Vibration/phase of vibration
phenotype /4/Genetics/Phenotype/phenotype
phenylketonuria /4/Medicine/Disease/Kinds/Organ/Nerve/Retardation/phenylketonuria
pheromone /1/Consciousness/Sense/Smell/Odor/Pheromone/pheromone
philanthropy /6/Economics/Microeconomics/Philanthropy/philanthropy
philosopher's stone /5/Chemistry/Inorganic/Chemical/philosopher's stone
phishing /3/Computer Science/Internet/Programs/Intrusive/Malware/phishing
phlebitis /4/Medicine/Disease/Kinds/Organ/Circulation/Inflammation/phlebitis
phlegm /4/Medicine/Disease/Kinds/Organ/Respiration/phlegm
phloem /4/Botany/Plant/Vascular/Tissue/Conductive/phloem
phoenix, myth /6/Religion/Religions/Mythology/Greco-Roman/Monster/phoenix myth
phoneme /6/Linguistics/Phonetics/Phoneme/phoneme
phonetic alphabet, sounds /6/Linguistics/Writing/Alphabet/Kinds/phonetic alphabet
phonetics /6/Linguistics/Phonetics/phonetics
phonogram, graph /6/Linguistics/Phonetics/phonogram
phonology /6/Linguistics/Phonetics/phonology
phonon /5/Physics/Wave/Sound/Kinds/phonon
phosphate bond /5/Chemistry/Biochemistry/Chemical Cycle/Energy/phosphate bond
phosphene /1/Consciousness/Sense/Vision/Problems/phosphene
phospholipid cascade /4/Zoology/Organ/Nerve/Neural Chemical/Regulator/phospholipid cascade
phosphorescence /5/Chemistry/Analytical Chemistry/Light Intensity/phosphorescence
photocell /5/Physics/Electromagnetism/Circuit/Kinds/Devices/Photocell/photocell
photocopier /7/Machine/Kinds/Optical/Copying/photocopier
photoelectric effect /5/Physics/Wave/Electromagnetic/photoelectric effect
photoengraving /7/Machine/Kinds/Optical/Copying/photoengraving
photoflood /7/Machine/Kinds/Illumination/Lighting/photoflood
photometer /5/Physics/Wave/Electromagnetic/Intensity/photometer
photon, light /5/Physics/Wave/Electromagnetic/Photon/photon of light
photon, particle /5/Physics/Matter/Particle/Subatomic/Boson/photon particle
photonic crystal /7/Machine/Kinds/Illumination/Lighting/Display/photonic crystal
photostat /7/Machine/Kinds/Optical/Copying/photostat
photosynthesis /5/Chemistry/Biochemistry/Carbohydrate/Chemical Reaction/photosynthesis
phrenology /4/Biology/Subjects/Animal/phrenology
phycology /4/Biology/Subjects/Plant/phycology
phylogeny /4/Zoology/Development/Processes/Recapitulation/phylogeny
physical therapy /4/Biology/Subjects/Medicine/physical therapy
physiognomy /4/Zoology/Organ/Skeleton/physiognomy
physiology /4/Biology/Subjects/physiology
physisorption /5/Physics/Dynamics/Fluid/Adhesion/physisorption
phytology /4/Biology/Subjects/Plant/phytology
pi bond /5/Chemistry/Inorganic/Chemical Bond/Kinds/Covalent/pi bond
piano concerto /2/Music/Classical/Composition Types/piano concerto
pictogram /6/Linguistics/Writing/Alphabet/Units/pictogram
pictograph /2/Art/History/Painting/pictograph
pictography /6/Linguistics/Writing/Alphabet/Kinds/pictography
piecework /6/Economics/Microeconomics/Production/Factors/Labor/Job/Kinds/piecework
piedmont /5/Earth Science/Land/Land Forms/High Area/piedmont
pietism /6/Religion/Religions/Christianity/pietism religion
piezoelectricity /5/Physics/Electromagnetism/Energy/piezoelectricity
pigmentation /4/Zoology/Organ/Skin/Features/pigmentation
pilaster /2/Art/Architecture/Building Parts/Column/pilaster
pile driver /7/Machine/Kinds/Mechanical/pile driver
pin the tail on the donkey /7/Game/Children/pin the tail on the donkey
piñata /7/Game/Children/pinata
pineal gland /4/Zoology/Organ/Endocrine Gland/Glands/pineal gland
pinfeather /4/Zoology/Organ/Skin/Feather/pinfeather
ping /7/Machine/Kinds/Engine/Sound/ping in engine
pinion /7/Machine/Parts/Gear/Kinds/pinion gear
pinion feather /4/Zoology/Organ/Skin/Feather/pinion feather
pinna /1/Consciousness/Sense/Hearing/Anatomy/Ear/Outer Ear/pinna
pinnacle /2/Art/Architecture/Building Parts/Roof/Ornaments/pinnacle
pinocytosis /4/Cell/Movement/pinocytosis
pinworm /4/Medicine/Disease/Kinds/Organism/Worm/pinworm
pion /5/Physics/Matter/Particle/Subatomic/Boson/Meson/pion
pipe symbol /6/Linguistics/Writing/Symbol/pipe
pipefitting /7/Machine/Kinds/Mechanical/Effects/pipefitting
pirouette, ballet /2/Dance/Ballet/Movements/pirouette
pistil, flower /4/Botany/Plant/Vascular/Angiosperm/Flower/Parts/Pistil/pistil flower
piston rod /7/Machine/Kinds/Engine/Linkage/piston rod
pitch, motion /5/Physics/Kinetics/Motion Types/Rotation/Types/pitch of rotation
pitch, sound /1/Consciousness/Sense/Hearing/Physiology/Frequency/pitch in hearing
pith /4/Botany/Plant/Vascular/Parts/Stem/pith
pitman /7/Machine/Kinds/Engine/Linkage/Rotation/pitman
piton /7/Machine/Kinds/Mechanical/piton
pivoting /3/Computer Science/Software/Database/pivoting of data
pixel /7/Machine/Kinds/Illumination/pixel
placebo /4/Medicine/Drug/General/placebo
placental mammal /4/Zoology/Kinds/Mammal/Placental/placental mammal
placer mining /6/Economics/Microeconomics/Business/Sectors/placer mining
plagiarism /2/Literature/plagiarism
plague /4/Medicine/Disease/Widespread/plague as disease
plaintiff /6/Law/Trial/Personnel/Lawyer/Litigants/plaintiff
planar gas discharge /7/Machine/Kinds/Illumination/Lighting/Display/planar gas discharge
planaria /4/Zoology/Kinds/Flatworm/Classes/planaria
Planck constant /5/Physics/Quantum Mechanics/Quantum/Kinds/Planck constant
plane geometry /3/Geometry/Plane/plane geometry
planetary /7/Machine/Parts/Gear/Kinds/planetary gear
planetary nebula /5/Astronomy/Star/planetary nebula
planimeter /7/Machine/Kinds/Instrument/planimeter
plankton /4/Ecology/Community/Food Chain/Organism Types/Ocean/Plankton/plankton
planned economy /6/Economics/Macroeconomics/Economy/Types/planned economy
planning /6/Economics/Microeconomics/Business/Administration/planning in business
plantar /4/Zoology/Organ/Skeleton/Bones/Extremity/Leg/plantar
plasma /4/Zoology/Organ/Blood/Parts/Plasma/plasma of blood
plasma cell /4/Zoology/Organ/Immune System/Cells/B Cell/plasma cell
plasma phase /5/Chemistry/Inorganic/Phase/Phases/Plasma/plasma phase
plasmid /4/Genetics/Recombinant DNA/Cloning/Vector/Bacteria/plasmid
plasmodium /4/Botany/Slime Mold/plasmodium
plasmon /5/Physics/Wave/Electromagnetic/Photon/plasmon
plastic glue /7/Machine/Tool/Fastening/Fastener/Glue/plastic glue
plastic surgery /4/Biology/Subjects/Medicine/plastic surgery
plastic, chemistry /5/Chemistry/Organic/Chemical/Polymer/plastic
plasticity /4/Zoology/Organ/Nerve/Neuron/Physiology/plasticity
plastid /4/Cell/Organelle/Plastid/plastid
plate tectonics /5/Earth Science/Planet/Plate Tectonics/plate tectonics
plateau, land /5/Earth Science/Land/Land Forms/High Area/plateau
platelet /4/Zoology/Organ/Blood/Parts/platelet
plea /6/Law/Trial/Plea/plea in law
pleading /6/Law/Trial/Documents/pleading
plebian /6/Law/National/Roman Law/Roman Classes/plebian
plebiscite /6/Political Science/Voting/Kinds/plebiscite
pledge, law /6/Law/Property/pledge in law
pleiotropism /4/Genetics/Phenotype/pleiotropism
plenary /6/Political Science/Government/Branch/Legislative/Session/plenary
pleura, lung /4/Zoology/Organ/Respiration/Parts/Lung/pleura
pleurisy /4/Medicine/Disease/Kinds/Organ/Respiration/pleurisy
plexus /4/Zoology/Organ/Nerve/Plexus/plexus
plié, ballet /2/Dance/Ballet/Movements/plie
plinth /5/Astronomy/Instruments/plinth
plotter /7/Machine/Kinds/Electromechanical/plotter
plotting /3/Computer Science/System Analysis/Phase Space/plotting in phase space
plutocracy /6/Political Science/Government/Kinds/plutocracy
pneumonia /4/Medicine/Disease/Kinds/Organ/Respiration/pneumonia
pneumothorax /4/Medicine/Disease/Kinds/Organ/Respiration/pneumothorax
pocket veto /6/Political Science/Government/Branch/Executive/pocket veto
podiatry /4/Biology/Subjects/Medicine/podiatry
pogo stick /7/Game/Children/pogo stick
pogrom /6/Political Science/Actions/Discrimination/pogrom
poikilotherm /4/Zoology/Kinds/Reptile/Temperature/poikilotherm
point, mortgage /7/Legal Affairs/Property/Housing/Buying/Mortgage/point on mortgage
polar bond /5/Chemistry/Inorganic/Chemical Bond/Kinds/Covalent/polar bond
polar, climate /5/Earth Science/Planet/Climate/Kinds/Latitude/polar climate
polarimeter /7/Machine/Kinds/Instrument/polarimeter
polarity /5/Chemistry/Inorganic/Phase/Solution/Electric/polarity
polarizability /5/Physics/Electromagnetism/Conductivity/Insulator/polarizability
polarization, wave /5/Physics/Wave/Electromagnetic/Polarization/polarization
polemic /2/Literature/Prose/Expressions/Serious/polemic
police power /6/Law/Police/police power
police state /6/Political Science/Government/Kinds/Autocracy/police state
polio /4/Medicine/Disease/Kinds/Organ/Nerve/Muscle/Paralysis/polio
polish /7/Machine/Parts/polish
political science /6/Political Science/political science
polka /2/Dance/Kinds/Europe/polka
poll /6/Sociology/Sociological Group/Communication/poll of opinion
poll tax /6/Political Science/Actions/Discrimination/poll tax
pollen /4/Botany/Plant/Vascular/Angiosperm/Flower/Parts/Stamen/Anther/pollen
pollination /4/Botany/Plant/Vascular/Angiosperm/Fertilization/pollination
pollution /4/Ecology/Pollution/pollution
polo /7/Game/Athletic/Riding/polo sport
poltergeist /6/Psychology/Parapsychology/Kinds/poltergeist
polychromatic light /5/Physics/Wave/Electromagnetic/Frequency/Color/polychromatic
polycythemia /4/Medicine/Disease/Kinds/Organ/Circulation/Blood/polycythemia
polygamy /6/Sociology/Family/Gender/polygamy
polyglot /6/Linguistics/Language/Region/polyglot
polygraph /7/Machine/Kinds/Instrument/polygraph
polygyny /6/Sociology/Family/Gender/polygyny
polyhedral angle /3/Geometry/Solid/Angle/polyhedral angle
polyhedron, solid /3/Geometry/Solid/Polyhedron/polyhedron in geometry
polymer /5/Chemistry/Organic/Chemical/Polymer/polymer
polymerase chain reaction /4/Genetics/Recombinant DNA/Amplification/polymerase chain reaction
polymerization /5/Chemistry/Organic/Chemical Reaction/polymerization
polymorphism, DNA /4/Genetics/Allele/Polymorphism/polymorphism DNA
polynomial time /3/Computer Science/Software/Algorithm/Polynomial/polynomial time
polyp, jellyfish /4/Zoology/Kinds/Coelenterate/Scyphozoa/polyp as jellyfish
polyp, mucosa /4/Medicine/Disease/Kinds/Cancer/Kinds/polyp on mucosa
polyphony /2/Music/Classical/Styles/polyphony
polyploidy /4/Genetics/Genome/Ploidy/polyploidy
polysaccharide /5/Chemistry/Biochemistry/Carbohydrate/Carbohydrates/Polymer/polysaccharide
polytene chromosome /4/Genetics/Chromosome/Kinds/polytene chromosome
polytheism /6/Religion/Belief/polytheism
polyunsaturated hydrocarbon /5/Chemistry/Biochemistry/Lipid/Kinds/Saturation/polyunsaturated hydrocarbon
pongid /4/Zoology/Kinds/Ape/Pongid/pongid
pons /4/Zoology/Organ/Nerve/Brain/Brainstem/Hindbrain/Pons/pons
pool /7/Game/Recreational/pool game
pop-out, memory /6/Psychology/Cognition/Memory/Processes/pop-out
population genetics /4/Genetics/Allele/Population Genetics/population genetics
pornography /2/Literature/Prose/Expressions/Serious/pornography
porosity /5/Earth Science/Water/Fresh/Soil/Spaces/porosity
porphyrin /5/Chemistry/Biochemistry/Carbohydrate/Carbohydrates/Porphyrin/porphyrin
portico /2/Art/Architecture/Building Parts/Room/portico
positional notation /3/Number Theory/Notation/positional notation
positivism /6/Philosophy/Epistemology/Theory/Realism/positivism
positron /5/Physics/Matter/Particle/Subatomic/Fermion/Lepton/positron
post and lintel /2/Art/Architecture/Building Parts/Arch/post and lintel
post partum /4/Zoology/Organ/Reproduction/Pregnancy/post partum
postage meter /7/Machine/Kinds/Printing/postage meter
post-modernism, epistemology /6/Philosophy/Epistemology/Theory/post-modernism epistemology
postscript /2/Literature/Prose/Kinds/Letter/postscript
pot, cooking /7/Machine/Kinds/Container/pot
potency /5/Chemistry/Biochemistry/Drug/potency
potential energy /5/Physics/Dynamics/Energy/potential energy
potentiometer /5/Physics/Electromagnetism/Circuit/Kinds/Instruments/potentiometer
poultice /4/Medicine/Medical Treatments/Wound/poultice
power function /3/Algebra/Function/Kinds/Polynomial/Kinds/power function
power of appointment /7/Legal Affairs/Property/power of appointment
power of attorney /7/Legal Affairs/Agency/power of attorney
power series /3/Calculus/Series/Kinds/Power/power series
power, physics /5/Physics/Dynamics/Energy/power of energy
praetor /6/Law/National/Roman Law/Roman Republic/Officials/praetor
pragmatics, linguistics /6/Linguistics/Structure/pragmatics
pragmatism, epistemology /6/Philosophy/Epistemology/Theory/pragmatism in epistemology
prairie /4/Ecology/Ecosystem/Bione/Land/prairie as plain
pratfall /2/Literature/Drama/pratfall
prayer /6/Religion/Psychology/Behavior/prayer
preamble /2/Literature/Prose/Kinds/Document/preamble
precedent /6/Law/Kinds/Case Law/precedent
precession /5/Physics/Dynamics/Rotation/Orbit/precession of orbit
precession of the equinoxes /5/Astronomy/Solar System/Orbit/Changes/precession of the equinoxes
precipitation from solution /5/Chemistry/Inorganic/Phase/Solution/Precipitation/precipitation of solute
precipitation, weather /5/Earth Science/Atmosphere/Precipitation/precipitation of water
précis /2/Literature/Prose/Kinds/Condensation/precis
precision /5/Physics/Measurement/Methods/precision
precognition /6/Psychology/Parapsychology/Kinds/precognition
predation, competition /4/Biology/Evolution/Selection/Competition/predation
predatory pricing /6/Economics/Microeconomics/Market/Structure/Monopoly/predatory pricing
predestination /6/Philosophy/Metaphysics/Theories/Determinism/predestination
predicate, grammar /6/Linguistics/Grammar/Syntax/Verb/predicate
preface, book /2/Literature/Book Parts/preface
preference curve /6/Economics/Psychology/Preferences/preference curve
preferment /6/Economics/Microeconomics/Production/Factors/Labor/Job/preferment
preferred stock /6/Economics/Microeconomics/Business/Kinds/Corporation/Stock/preferred stock
prefix, affix /6/Linguistics/Grammar/Inflection/Affix/prefix
prefrontal lobe /4/Zoology/Organ/Nerve/Brain/Cerebrum/Prefrontal Lobe/prefrontal lobe
prehensile /4/Zoology/Organ/Muscle/Muscles/prehensile
prejudice /6/Psychology/Attitude/prejudice
prelude /2/Music/Classical/Composition Types/Church/prelude
premeditation /6/Law/Crime/premeditation
premium /7/Financial Affairs/Investing/Bond/premium payment
prenatal /4/Zoology/Organ/Reproduction/Pregnancy/prenatal
preparatory school /6/Education/Levels/Type/preparatory school
preposition /6/Linguistics/Grammar/Syntax/Sentence/Preposition/preposition
presentment /6/Law/Trial/Witness/Testimony/presentment in law
president /6/Political Science/Government/Branch/Executive/People/president
presidential democracy /6/Political Science/Government/Kinds/Democracy/presidential democracy
press /7/Machine/Kinds/Printing/press for printing
pressure cooker /7/Machine/Kinds/Heat/pressure cooker
pressure sensitive tape /7/Machine/Tool/Fastening/Fastener/Glue/tape
pressure, physics /5/Physics/Dynamics/Pressure/pressure
priapism /4/Medicine/Disease/Kinds/Organ/Circulation/priapism
price ceiling /6/Economics/Microeconomics/Market/Restrictions/price ceiling
price discrimination /6/Economics/Microeconomics/Market/price discrimination
price index /6/Economics/Microeconomics/Money/Price/price index
price support /6/Economics/Macroeconomics/Government Actions/price support
price-earnings ratio /6/Economics/Microeconomics/Finance/Securities/price-earnings ratio
pride /4/Zoology/Kinds/Mammal/Group/pride of lions
primary cell /5/Chemistry/Inorganic/Oxidation-Reduction/Battery/primary cell
primary group /6/Sociology/Sociological Group/Kinds/Order/primary group
primary pigment /5/Physics/Wave/Electromagnetic/Frequency/Color/primary pigment
primary school /6/Education/Levels/primary school
prime meridian /5/Earth Science/Planet/Earth Coordinates/Longitude/prime meridian
prime minister /6/Political Science/Government/Branch/Executive/People/prime minister
prime number /3/Number Theory/Number Types/prime number
primer, DNA /4/Genetics/Recombinant DNA/Amplification/DNA Sequence/primer for nucleic acid
primitive streak /4/Zoology/Development/Stages/Gestation/Embryo 014 Day/primitive streak
primogeniture, custom /6/Law/History/Feudal Law/primogeniture began
primogeniture, estate /7/Legal Affairs/Death/Will/Probate/primogeniture
principal, education /6/Education/Teaching/principal of school
printed circuit /7/Machine/Kinds/Electronic/Parts/Chip/printed circuit
printing in color /7/Machine/Kinds/Printing/printing in color
prion /4/Medicine/Disease/Kinds/Protein/prion
prism /3/Geometry/Solid/Polyhedron/Kinds/Prism/prism
prisoner's dilemma /3/Game Theory/Game Types/prisoner's dilemma
private property /6/Economics/Microeconomics/Property/private property
privilege /6/Law/Tort/Defenses/privilege
prize, ship /6/Law/Crime/Crimes/Theft/prize in law
probable cause /6/Law/Trial/Decision/probable cause
probate /7/Legal Affairs/Death/Will/Probate/probate
proboscid /4/Zoology/Kinds/Proboscid/proboscid
proboscis /4/Zoology/Kinds/Proboscis Worm/proboscis of worm
process printing /7/Machine/Kinds/Printing/Kinds/process printing
processional /2/Music/Classical/Composition Types/Church/processional
processor-in-memory /7/Machine/Kinds/Electronic/Parts/Chip/processor-in-memory
proctology /4/Biology/Subjects/Medicine/proctology
proctoscopy /4/Medicine/Medical Examination/Tests/proctoscopy
procurement /6/Law/Crime/Crimes/Sex/procurement
product, reaction /5/Chemistry/Inorganic/Chemical Reaction/Equation/product of reaction
production factor /6/Economics/Microeconomics/Production/Factors/production factor
production possibilities curve /6/Economics/Microeconomics/Finance/Scale/production possibilities
production unit /6/Economics/Microeconomics/Production/Factors/production unit
productivity, business /6/Economics/Microeconomics/Finance/Scale/productivity in business
profit /6/Economics/Microeconomics/Money/profit
progesterone /4/Zoology/Organ/Endocrine Gland/Hormone/Sex/progesterone
prognosis, outcome /4/Medicine/prognosis
programmed learning /6/Education/Classroom/Methods/programmed learning
programming language /3/Computer Science/Software/Programming/Languages/programming language
progressive tax /6/Economics/Macroeconomics/Government Actions/Tax/Types/progressive tax
projective geometry /3/Geometry/Kinds/Projective Geometry/projective geometry
projective test /6/Psychology/Techniques/Projective Test/projective test
projector /7/Machine/Kinds/Illumination/projector
prokaryote /4/Biology/Evolution/Classification/Cell Nucleus/prokaryote
prolactin /4/Zoology/Organ/Endocrine Gland/Hormone/Sex/prolactin
prologue /2/Literature/Book Parts/prologue
promissory note /7/Financial Affairs/Loan/Type/promissory note
promontory /5/Earth Science/Land/Land Forms/High Area/promontory
pronoun /6/Linguistics/Grammar/Syntax/Noun/Pronoun/pronoun
proofreading /6/Education/Writing/Process/proofreading
propaganda, group /6/Sociology/Sociological Group/Communication/Propaganda/propaganda in group
proparoxytone /6/Linguistics/Phonetics/Modulation/Accent/Word/proparoxytone
proper noun /6/Linguistics/Grammar/Syntax/Noun/Kinds/proper noun
property settlement /7/Legal Affairs/Marriage/Divorce/Agreements/property settlement
prophylaxis /4/Medicine/Medical Treatments/prophylaxis
proscenium arch /2/Art/Architecture/Building Parts/Theater/proscenium arch
proscription /6/Law/Trial/Decision/proscription
prosecutor /6/Law/Trial/Personnel/Lawyer/Litigants/prosecutor
prosimian /4/Zoology/Kinds/Prosimian/prosimian
prosody, grammar /6/Linguistics/Phonetics/prosody in phonology
prospect, land /5/Earth Science/Land/Land Forms/prospect region
prospectus /7/Financial Affairs/Investing/prospectus
prostaglandin /4/Zoology/Organ/Endocrine Gland/Hormone/Nerve/prostaglandin
prostate cancer /4/Medicine/Disease/Kinds/Cancer/Kinds/Organ/prostate cancer
prostate gland /4/Zoology/Organ/Reproduction/Male/Parts/prostate gland
prosthesis /4/Medicine/Medical Treatments/Devices/prosthesis
prosthodontics /4/Biology/Subjects/Medicine/Dentistry/prosthodontics
prostration /4/Medicine/Disease/Kinds/prostration
protagonist /2/Literature/Prose/Theory/Characters/protagonist
proteasome /5/Chemistry/Biochemistry/Protein/proteasome
protective coloration /4/Biology/Evolution/Adaptation/protective coloration
protectorate /6/Law/National/International Law/State Relations/Kinds/protectorate state
protein folding /5/Chemistry/Biochemistry/Protein/Chemical Reaction/protein folding
protein, peptide /5/Chemistry/Biochemistry/Protein/protein
proteomics /4/Genetics/Genome/proteomics
proteosome /4/Cell/Organelle/Microsome/Lysosome/proteosome
protocol, experiment /5/Chemistry/Biochemistry/Drug/Experiment/protocol for experiment
protocol, Internet /3/Computer Science/Internet/Protocol/protocol on Internet
protocol, law /6/Law/National/International Law/Agreements/Kinds/protocol in law
proto-cooperation /4/Ecology/Community/Species Relations/proto-cooperation
proton /5/Physics/Matter/Particle/Subatomic/Fermion/Baryon/proton
protonema /4/Botany/Plant/Non-Vascular Plants/Moss/protonema
protoplasm /4/Cell/Organelle/Plasm/protoplasm
protoplast /4/Genetics/Plant/Regeneration/protoplast
protozoa /4/Zoology/Kinds/Protozoa/protozoa
province /6/Law/National/Roman Law/Roman Empire/province
proxy /6/Law/Principles/proxy
pruritis /4/Medicine/Disease/Kinds/Organism/Bacteria/Skin/pruritis
psalm /2/Literature/Poetry/Kinds/Church/psalm
pseudonym /6/Linguistics/Semantics/Word/Relations/pseudonym
psoriasis /4/Medicine/Disease/Kinds/Organism/Fungus/psoriasis
psyche /6/Religion/Soul/psyche soul
psychiatry /4/Biology/Subjects/Medicine/psychiatry
psychokinesis /6/Psychology/Parapsychology/Kinds/psychokinesis
psychosis /4/Medicine/Disease/Kinds/Organ/Nerve/Mental/Psychosis/psychosis
psychosomatic disease /4/Medicine/Disease/Kinds/Organ/Nerve/Mental/psychosomatic disease
ptomaine poisoning /4/Medicine/Disease/Kinds/Organism/Bacteria/ptomaine
puberty /4/Zoology/Development/Stages/Adolescent 12-18 Years/puberty
pubes /4/Zoology/Organ/Reproduction/Anatomy/pubes
pubescence /4/Zoology/Development/Stages/Child 09-14 Years/pubescence
pubis /4/Zoology/Organ/Skeleton/Bones/Trunk/Pelvis/pubis
public defender /6/Law/Trial/Personnel/Lawyer/Litigants/public defender
public domain /6/Law/Property/public domain
public good /6/Economics/Microeconomics/Goods/public good
public law /6/Law/Kinds/Statutory Law/public law
publishing /6/Education/Writing/Process/publishing
pueblo /6/History/History/Invention/America/pueblo
pullet /4/Zoology/Kinds/Bird/Gender/pullet
pulley /7/Machine/Kinds/Mechanical/Rotation/Pulley/pulley
pulmonary /4/Zoology/Organ/Respiration/General/pulmonary as lung
pulmonary artery /4/Zoology/Organ/Circulation/Parts/Heart/Flow/pulmonary artery
pulmonary vein /4/Zoology/Organ/Circulation/Parts/Heart/Flow/pulmonary vein
pulpwood /4/Botany/Plant/Vascular/Parts/Wood/pulpwood
pulsar /5/Astronomy/Star/Kinds/pulsar
pulse, blood /4/Zoology/Organ/Circulation/Pulse/pulse of blood
pulsejet engine /7/Machine/Kinds/Engine/Kinds/Jet/pulsejet engine
pump priming, economics /6/Economics/Macroeconomics/Government Actions/pump priming
pump, machine /7/Machine/Kinds/Fluid/Pump/pump
pun /2/Literature/Rhetoric/Word Play/pun
punitive damages /6/Law/Contract/Damages/punitive damages
pupa /4/Zoology/Kinds/Arthropod/Insect/Metamorphosis/Stage/pupa
pupil /1/Consciousness/Sense/Vision/Anatomy/Eye/pupil of eye
pupil dilation reflex /4/Zoology/Organ/Nerve/Reflex/pupil dilation reflex
pupil dilation, eye /4/Medicine/Medical Examination/Eye Exam/pupil dilation for eye exam
purgative /4/Medicine/Drug/Classes/purgative
purine /5/Chemistry/Biochemistry/Nucleic Acid/Nucleotide/purine
purine neurotransmitter /4/Zoology/Organ/Nerve/Neural Chemical/Transmitter/purine neurotransmitter
purpura /4/Medicine/Disease/Kinds/Organ/Circulation/Bleeding/purpura
pus /4/Zoology/Organ/Immune System/pus
pustule /4/Medicine/Disease/Kinds/Organ/Skin/Pus/pustule
putrefaction /4/Medicine/Disease/Kinds/Organ/Skin/putrefaction
pychnometer /7/Machine/Kinds/Instrument/pychnometer
pylorus /4/Zoology/Organ/Digestion/Parts/Stomach/pylorus
pyorrhea /4/Medicine/Disease/Kinds/Organism/Bacteria/Mouth/pyorrhea
pyramid power /6/Psychology/Parapsychology/Kinds/pyramid power
pyramidal cell /4/Zoology/Organ/Nerve/Neuron/Kinds/pyramidal cell
pyretic /4/Medicine/Disease/Kinds/Fever/pyretic
pyrimidine, nucleic acid /5/Chemistry/Biochemistry/Nucleic Acid/Nucleotide/pyrimidine
pyrite /5/Earth Science/Mineral/Kinds/Iron/pyrite
pyrogen /4/Medicine/Disease/Kinds/Fever/pyrogen
pyromania /4/Medicine/Disease/Kinds/Organ/Nerve/Mental/Neurosis/Obsession/pyromania
pyrometer /7/Machine/Kinds/Instrument/pyrometer
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Date Created: 2022.0223