rabies /4/Medicine/Disease/Kinds/Organism/Virus/rabies
racemization /5/Chemistry/Organic/Bond Orientation/Isomer/Stereo/Enantiomer/racemization
rack /7/Machine/Parts/Gear/rack of gear
radar /7/Machine/Kinds/Electronic/Light/Wave/radar
radial acceleration /5/Physics/Kinetics/Motion Types/Rotation/radial acceleration
radial symmetry /3/Geometry/Transformation/Symmetry/Kinds/radial symmetry
radial velocity /5/Physics/Kinetics/Motion Types/Rotation/radial velocity
radiation, heat /5/Physics/Heat/Transfer/radiation of heat
radiator /7/Machine/Kinds/Fluid/radiator
radical, molecule /5/Chemistry/Inorganic/Chemical/Molecule/Electron/radical of molecule
radio frequency identification tags /7/Machine/Kinds/Electronic/Light/Wave/radio frequency identification tags
radio galaxy /5/Astronomy/Galaxy/Kinds/radio galaxy
radio wave /5/Physics/Wave/Electromagnetic/Frequency/Radiation Types/Spectrum/radio wave
radio, machine /7/Machine/Kinds/Electronic/Light/Wave/radio machine
radioactive element /5/Chemistry/Inorganic/Chemical/Element/Kinds/radioactive element
radioactive isotope /5/Physics/Matter/Atom/Isotope/radioactive isotope
radioactivity /5/Physics/Matter/Atom/Nucleus/Radioactivity/radioactivity general
radiology /4/Biology/Subjects/Medicine/radiology
radiometer /7/Machine/Kinds/Instrument/radiometer
radiotherapy /4/Medicine/Medical Treatments/Cancer/radiotherapy
radius /4/Zoology/Organ/Skeleton/Bones/Extremity/Arm/radius
radula /4/Zoology/Kinds/Mollusc/radula
ragtime /2/Music/Jazz/ragtime
rain /5/Earth Science/Atmosphere/Precipitation/rain
rainbow /5/Earth Science/Atmosphere/rainbow
Raman scattering /5/Physics/Wave/Electromagnetic/Frequency/Radiation Types/Raman scattering
ramjet engine /7/Machine/Kinds/Engine/Kinds/Jet/Ramjet/ramjet engine
rancid /5/Chemistry/Biochemistry/Lipid/Chemical Reaction/rancid
range, variable /3/Algebra/Function/Range/range of function
rape /6/Law/Crime/Crimes/Sex/rape
rapid eye movement sleep /1/Consciousness/States/Sleep/Sleep Cycle/rapid eye movement sleep
rapids /5/Earth Science/Water/Fresh/Areas/River/Falls/rapids
ratchet wheel /7/Machine/Kinds/Mechanical/Rotation/ratchet wheel
rational coordination /6/Sociology/Society/Social Organization/rational coordination
rational number /3/Number Theory/Number Types/rational number
rationalism, epistemology /6/Philosophy/Epistemology/Theory/Idealism/rationalism in epistemology
rationing, market /6/Economics/Microeconomics/Market/Restrictions/rationing
ravine /5/Earth Science/Land/Land Forms/Low Area/ravine
razor /7/Machine/Kinds/Mechanical/Household/razor
reactance /5/Physics/Electromagnetism/Circuit/Impedance/reactance
reactant /5/Chemistry/Inorganic/Chemical Reaction/Equation/reactant
reaction engine /7/Machine/Kinds/Engine/Kinds/Jet/reaction engine
reaction rate /5/Chemistry/Inorganic/Chemical Reaction/Rate/reaction rate
reaction time /6/Psychology/Behavior/reaction time
read-only memory /7/Machine/Kinds/Electronic/Calculator/read-only memory
real estate, business /6/Economics/Microeconomics/Business/Sectors/real estate
real number /3/Number Theory/Number Types/real number
realism, metaphysics /6/Philosophy/Epistemology/Theory/Reality/realism in metaphysics
realty /6/Economics/Microeconomics/Business/Sectors/realty
reaper /7/Machine/Transportation/Vehicle/Agriculture/reaper
rebellion /6/Political Science/Revolution/rebellion
rebus principle /6/Linguistics/Writing/rebus principle
rebus, game /7/Game/Puzzle/rebus game
recall /6/Psychology/Cognition/Memory/Recall/recall in memory
recall from office /6/Law/History/American Law/recall from office
receiver, bankruptcy /6/Economics/Microeconomics/Finance/receiver of property
recessional /2/Music/Classical/Composition Types/Church/recessional
recessive allele /4/Genetics/Allele/Segregation/Dominant-Recessive/recessive allele
recidivism /4/Genetics/Phenotype/Mixtures/recidivism
recitation method /6/Education/Classroom/Methods/recitation method
recombinant DNA /4/Genetics/Recombinant DNA/recombinant DNA
recombination, DNA /4/Cell/Cell Cycle/Meiosis/Recombination/recombination of chromosome
record, data /3/Computer Science/Software/Data Hierarchy/record of data
recruiter /6/Education/Job/Employment Agency/recruiter
rectification of curve /3/Geometry/Plane/Curve/rectification of curve
rectifier /5/Physics/Electromagnetism/Circuit/Kinds/Devices/rectifier
rectilinear motion /5/Physics/Kinetics/Motion Types/rectilinear motion
rectum /4/Zoology/Organ/Digestion/Parts/Colon/rectum
recursive function /6/Linguistics/Grammar/Syntax/Recursion/recursive function grammar
red blood cell /4/Zoology/Organ/Blood/Parts/Red Blood Cell/red blood cell
red giant /5/Astronomy/Star/Kinds/red giant
red herring /3/Logic/Fallacy/Irrelevance/red herring
red light /5/Physics/Wave/Electromagnetic/Frequency/Radiation Types/Spectrum/red light
red tide /4/Botany/Algae/Kinds/Dinoflagellate/red tide
redirect examination /6/Law/Trial/Witness/redirect examination
reduced sugar /5/Chemistry/Biochemistry/Carbohydrate/Carbohydrates/Sugar/reduced sugar
reducing agent /5/Chemistry/Inorganic/Oxidation-Reduction/Agent/reducing agent
reductio ad absurdum /3/Logic/Reasoning/Deduction/reductio ad absurdum
reduction /5/Chemistry/Inorganic/Oxidation-Reduction/reduction
reductionism, metaphysics /6/Philosophy/Metaphysics/Theories/Matter/reductionism in metaphysics
reed, plant /4/Botany/Plant/Kinds/Grass/reed
reef /5/Earth Science/Land/Land Forms/Shore/reef
references /6/Education/Job/Documents/references list
referendum /6/Law/History/American Law/referendum
reflection, light /5/Physics/Wave/Superposition/Reflection/reflection of wave
reflex camera /7/Machine/Kinds/Optical/Camera/reflex camera
reflex, nerve /4/Zoology/Organ/Nerve/Reflex/reflex of nerves
reformer /7/Machine/Kinds/Fluid/Petroleum/reformer
refraction /5/Physics/Wave/Superposition/Refraction/refraction
refractive index /5/Physics/Wave/Superposition/Refraction/refractive index
refractory period, neuron /4/Zoology/Organ/Nerve/Neuron/Physiology/refractory period neuron
refrigerator /7/Machine/Kinds/Electromechanical/Cooling/refrigerator
regelation, ice /5/Physics/Heat/Phase/Liquid/regelation
regeneration, biology /4/Zoology/Regeneration/regeneration growth
regenerative receiver /7/Machine/Kinds/Electronic/Amplifier/regenerative receiver
regicide /6/Law/Crime/Crimes/Violent/Murder/regicide
register, computer /3/Computer Science/Hardware/Parts/register
registered trademark /6/Linguistics/Writing/Symbol/registered trademark
registry /6/Economics/Microeconomics/Freight/registry of ships
regression line /3/Statistics/Correlation/Regression/regression line
regressive tax /6/Economics/Macroeconomics/Government Actions/Tax/Types/regressive tax
regulation, DNA /4/Genetics/DNA Regulation/regulation of DNA
regulation, law /6/Law/Kinds/Statutory Law/regulation as law
reinforcement /6/Psychology/Behavior/Motivation/Reinforcement/reinforcement
relative velocity /5/Physics/Relativity/relative velocity
relativistic quantum mechanics /5/Physics/Quantum Mechanics/Theory/Quantum Relativity/Theories/Field/relativistic quantum mechanics
relativity principle /5/Physics/Relativity/relativity
relaxin /4/Zoology/Organ/Endocrine Gland/Hormone/Sex/relaxin
relay /7/Machine/Kinds/Electric/Switch/relay
reliability, system /3/Computer Science/System Analysis/Operation/reliability of system
religious humanism /6/Religion/Belief/religious humanism
remand /6/Law/Trial/Decision/remand
remittance /6/Economics/Microeconomics/Finance/remittance
remote control /7/Machine/Kinds/Electronic/Sound/remote control
remotely operated vehicle /7/Machine/Transportation/Vehicle/remotely operated vehicle
renal /4/Zoology/Organ/Excretion/renal about kidney
reparation /6/Political Science/International Relations/Kinds/Control/reparation
replicate, sample /4/Genetics/Recombinant DNA/Sample/replicate of sample
replication, DNA /5/Chemistry/Biochemistry/Nucleic Acid/Replication/replication of DNA
reporting /1/Consciousness/Studies/Third-Person Methods/reporting
representative /6/Political Science/Government/Branch/Legislative/Representative/representative
repression, DNA /4/Genetics/DNA Regulation/Protein/repression of DNA
reprisal, law /6/Law/National/International Law/State Relations/reprisal by state
reproducibility /5/Physics/Measurement/Methods/reproducibility
reproduction, organism /4/Biology/Evolution/Reproduction/reproduction in evolution
reproductive potential /4/Ecology/Community/Population/Growth/Potential/reproductive potential
reproductive system /4/Zoology/Organ System/Reproductive System/reproductive system
reproductive tissue /4/Zoology/Tissue/reproductive tissue
requiem /2/Music/Classical/Composition Types/Church/requiem
requisition /6/Economics/Microeconomics/Finance/requisition
resection /4/Medicine/Medical Treatments/Surgery/Techniques/resection
reserve ratio /6/Economics/Macroeconomics/Government Actions/Monetary Policy/reserve ratio
reserves, bank /6/Economics/Microeconomics/Banking/reserves
resin, mineral /5/Earth Science/Mineral/Kinds/Organic/resin as mineral
resistance /5/Physics/Electromagnetism/Conductivity/resistance of electricity
resolution procedure /3/Computer Science/Software/Algorithm/Kinds/Search/resolution procedure
resolution, vector /3/Calculus/Vector/Operations/Sum/resolution of vectors
resonance, bonding /5/Chemistry/Inorganic/Chemical Bond/resonance of bonds
resonance, wave /5/Physics/Wave/Superposition/Resonance/resonance of waves
resonator /7/Machine/Kinds/Electronic/resonator
respirator /4/Medicine/Medical Treatments/Devices/respirator
respiratory system /4/Zoology/Organ System/respiratory system
rest energy /5/Physics/Relativity/rest energy
resultant vector /3/Calculus/Vector/Operations/Sum/resultant vector
resultant, forces /5/Physics/Dynamics/Resultant/resultant of forces
resumé /6/Education/Job/Documents/resume
resurrection, Christianity /6/Religion/Religions/Christianity/Events/resurrection of body
resuscitation /4/Medicine/Medical Treatments/resuscitation
retail, business /6/Economics/Microeconomics/Business/Kinds/Customer Types/retail
retainer, agency /6/Education/Job/retainer as job fee
retardation /6/Psychology/Intelligence/Levels/retardation
rête /4/Zoology/Organ/Circulation/Parts/rete circulation
rete mirabile /4/Zoology/Kinds/Bird/rete mirabile
reticular formation /4/Zoology/Organ/Nerve/Brain/Brainstem/reticular formation
reticulocyte /4/Zoology/Organ/Blood/Parts/Red Blood Cell/reticulocyte
retina /1/Consciousness/Sense/Vision/Anatomy/Eye/Retina/retina
retinitis pigmentosa /1/Consciousness/Sense/Vision/Problems/retinitis pigmentosa
retorsion /6/Law/National/International Law/State Relations/retorsion
retractor /4/Medicine/Medical Treatments/Surgery/Instrument/retractor
retrieval, memory /6/Psychology/Cognition/Memory/Recall/retrieval in recall
retrorocket /7/Machine/Kinds/Engine/Kinds/Rocket/retrorocket
retroversion /4/Medicine/Disease/Kinds/Organ/Abdomen/retroversion
revelation, knowledge /6/Philosophy/Epistemology/Reference Source/revelation as reference
revenue /6/Economics/Microeconomics/Finance/revenue
reverse osmosis /5/Earth Science/Water/Fresh/Mechanical/reverse osmosis
reversion /4/Medicine/reversion
revival /6/Religion/Sociology/revival
revocation /7/Legal Affairs/Death/Will/Revocation/revocation
revolution, physics /5/Physics/Kinetics/Motion Types/Rotation/revolution as rotation
revolution, politics /6/Political Science/Revolution/revolution in politics
rhapsody /2/Music/Classical/Composition Types/rhapsody
rheostat /5/Physics/Electromagnetism/Circuit/Kinds/Devices/rheostat
rhetorical question /2/Literature/Prose/Expressions/Serious/rhetorical question
rheumatic fever /4/Medicine/Disease/Kinds/Organism/Bacteria/rheumatic fever
rheumatism /4/Medicine/Disease/Kinds/Organ/Skeleton/rheumatism
rheumatoid arthritis /4/Medicine/Disease/Kinds/Organ/Skeleton/Joint/rheumatoid arthritis
rhinencephalon /4/Zoology/Organ/Nerve/Brain/Cephali/rhinencephalon
rhinestone /5/Earth Science/Mineral/Kinds/Silicates/rhinestone
rhinoplasty /4/Medicine/Medical Treatments/Surgery/Kinds/rhinoplasty
rhizoid /4/Botany/Plant/Non-Vascular Plants/Moss/rhizoid
rhizome /4/Botany/Plant/Vascular/Parts/Stem/Kinds/rhizome
rhodopsin /4/Genetics/Gene/Cell Surface Receptor/Binding/rhodopsin
rhombencephalon /4/Zoology/Organ/Nerve/Brain/Cephali/rhombencephalon
rhombohedron /3/Geometry/Solid/Polyhedron/Kinds/Number Of Faces/rhombohedron
rhombus /3/Geometry/Plane/Polygon/Kinds/Quadrilateral/rhombus
rib cage /4/Zoology/Organ/Skeleton/Bones/Trunk/Rib/rib cage
ribonucleic acid /5/Chemistry/Biochemistry/Nucleic Acid/RNA/ribonucleic acid
ribosomal RNA /5/Chemistry/Biochemistry/Nucleic Acid/RNA/ribosomal RNA
ribosome /4/Cell/Organelle/Microsome/ribosome
ricer /7/Machine/Kinds/Mechanical/Sieve/ricer
Richter scale /5/Earth Science/Planet/Plate Tectonics/Earthquake/Richter scale
rickets /4/Medicine/Disease/Kinds/Nutrition/rickets
rider /6/Law/Contract/rider in law
ridge, mountain /5/Earth Science/Planet/Plate Tectonics/Mountain Building/ridge at rift
rifle, weapon /7/Military Affairs/Weapon/Gun/Rifle/rifle
rift /5/Earth Science/Planet/Plate Tectonics/Rift/rift in crustal plate
rig, structure /7/Machine/Kinds/Mechanical/Rig/rig
right hand rule, magnetism /5/Physics/Electromagnetism/Magnetism/Force/right hand rule magnetism
right hand rule, vector /3/Calculus/Vector/Operations/Product/right hand rule for vectors
right hemisphere /4/Zoology/Organ/Nerve/Brain/Cerebrum/right hemisphere
right of aid /6/Law/History/Feudal Law/right of aid
right of relief /6/Law/History/Feudal Law/right of relief
right triangle /3/Geometry/Plane/Polygon/Kinds/Triangle/Kinds/right triangle
right-to-work law /6/Economics/Microeconomics/Production/Factors/Labor/Union/right-to-work law
rill /5/Earth Science/Water/Fresh/Areas/River/rill
ringworm /4/Medicine/Disease/Kinds/Organism/Fungus/ringworm
rip current /5/Earth Science/Water/Ocean/Areas/rip current
ripcord /7/Machine/Kinds/Mechanical/ripcord
ripening /5/Chemistry/Biochemistry/Carbohydrate/Chemical Reaction/ripening
riptide /5/Earth Science/Water/Ocean/Areas/riptide
risk premium /6/Economics/Microeconomics/Money/risk premium
rite of passage /6/Sociology/Family/rite of passage
ritual /6/Religion/Sociology/ritual
rivalry, perception /6/Psychology/Cognition/Perception/Properties/rivalry
river blindness /4/Medicine/Disease/Kinds/Organism/Worm/river blindness
rivulet /5/Earth Science/Water/Fresh/Areas/River/rivulet
RNA splicing /4/Genetics/Post-Transcription/Splicing/RNA splicing
robbery /6/Law/Crime/Crimes/Theft/robbery
robot, Internet /3/Computer Science/Internet/Programs/Robots/robot on Internet
robustness, system /3/Computer Science/System Analysis/Operation/robustness
roc /6/Religion/Religions/Mythology/Greco-Roman/Monster/roc
rockabilly /2/Music/History/Country Music/Styles/rockabilly
rocker arm /7/Machine/Kinds/Engine/Linkage/rocker arm
rocket /7/Machine/Kinds/Engine/Kinds/Rocket/rocket
Rocky Mountain spotted fever /4/Medicine/Disease/Kinds/Organism/Bacteria/Skin/Rocky Mountain spotted fever
rodent, animal /4/Zoology/Kinds/Rodent/rodent
rodeo /7/Game/Athletic/Riding/rodeo
roentgenogram /4/Medicine/Medical Examination/Tests/roentgenogram
roll, rotation /5/Physics/Kinetics/Motion Types/Rotation/Types/roll of rotation
roller bearing /7/Machine/Parts/Bearing/roller bearing
roller-skating /7/Game/Athletic/roller-skating
rondeau, dance /2/Dance/Kinds/Europe/rondeau dance
rondo /2/Music/Classical/Composition Types/rondo
rookery /4/Zoology/Kinds/Bird/Group/rookery
root hair /4/Botany/Plant/Vascular/Parts/Root/root hair
root, equation /3/Algebra/Equation/Solution/root of equation
root, plant /4/Botany/Plant/Vascular/Parts/Root/root of plant
root, word /6/Linguistics/Grammar/Inflection/Root/root in grammar
rostral /4/Biology/Life/Body Locations/Head And Tail/rostral side
rot /4/Botany/Plant/Vascular/Parts/Tree/rot of plant
rotary engine /7/Machine/Kinds/Engine/Kinds/rotary engine
rotation period /5/Physics/Kinetics/Motion Types/Rotation/rotation period
rotavirus /4/Medicine/Disease/Kinds/Organism/Virus/rotavirus
roughage /4/Nutrition/Food Types/roughage
roulette game /7/Game/Recreational/roulette game
round, music /2/Music/Classical/Composition Types/round
roundish flat worm /4/Zoology/Kinds/Invertebrate/roundish flat worm
rowing /7/Game/Athletic/Water/rowing
rubber /7/Machine/Industrial Materials/Rubber/rubber
rubber cement /7/Machine/Tool/Fastening/Fastener/Glue/rubber cement
rubella /4/Medicine/Disease/Kinds/Organism/Bacteria/rubella
ruby, mineral /5/Earth Science/Mineral/Kinds/Aluminum/ruby mineral
rugby /7/Game/Athletic/Ball/rugby
rule of law /6/Political Science/Actions/Policy/rule of law
ruled surface /3/Geometry/Solid/Surface/Kinds/ruled surface
rumba, dance /2/Dance/Kinds/Latin/rumba
rune, letter /6/Linguistics/Writing/Alphabet/Linear/rune of alphabet
rune, Norse /6/Religion/Religions/Mythology/Norse/Thing/rune of gods
rut, sex /4/Zoology/Organ/Reproduction/Female/Menstruation/rut
Rx symbol /6/Linguistics/Writing/Symbol/Pictogram/Rx
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Description of Outline of Knowledge Database
Date Created: 2022.0223