Biology Dictionary: R
Search or browse the dictionary for the definition of biology terms starting with the letter “R”.
Dictionary > R
R
- R factor
- R loop
- Rac
- Race
- Racemose
- Rachischisis
- Rad
- Radial immunodiffusion
- Radial symmetry
- Radiata
- Radiate
- Radiation
- Radiation biophysics
- Radical
- Radioactive
- Radioactive atom
- Radioactive decay
- Radiodensity
- Radix ventralis
- Raffinose
- Raillietina
- Railroad nystagmus
- Raisins
- Ramenta
- Rami
- Ranal
- Random allocation
- Range
- Ranikhet disease
- Rare species
- Ras
- Rayleigh criterion
- Rb
- RDNA
- Reactants
- Reaction center
- Reaction centre
- Reactive oxygen species
- Reading frame
- Reaginic antibody
- Realized niche
- Reannealing
- Rebound phenomenon
- Recalcitrant
- Recapitulation theory
- Receiver cell
- Recent single-origin hypothesis
- Receptaculum chyli
- Receptor
- Recess
- Recessive
- Recessive trait
- Recombinant DNA
- Recombination
- Recombination DNA repair
- Recon
- Reconstitution
- Recruitment
- Red algae
- Red blood cell
- Red drop effect
- Redia
- Redox reaction
- Reduced eye
- Reduced penetrance
- Reducing enzyme
- Reducing sugar
- Reductant
- Reductase
- Reduction
- Reduction Division
- Reduction en masse
- Redundancy Hypothesis
- Rees-ecker fluid
- Reflection
- Reflex
- Reflex arc
- Refractile
- Refractory Period
- Refuse disposal
- Regeneration
- Regio inguinalis
- Regio lumbalis
- Regio mentalis
- Regional anatomy
- Regional continuity model
- Regulation
- Regulator
- Regulatory gene
- Regurgitation
- Reins
- Relative fitness
- Relax
- Relaxed dna
- Relaxed plasmid
- Relay neuron
- Release phenomenon
- Reliability coefficient
- Remedies
- Remission
- Remove
- Renal column
- Renal cortex
- Renal medulla
- Renal pyramid
- Renaturation
- Renewable resource
- Rennase
- Rennin
- Renogastric
- Repeated sequences
- Repellent
- Repetitive DNA
- Replacement
- Replacement bone
- Replacement model
- Replica plating
- Replicase
- Replicate
- Replication
- Repolarization
- Repression-sensitization
- Repressor protein
- Reproduction
- Reproductive adaptation
- Reproductive Cell
- Reproductive isolation
- Reproductive system
- Reptiles
- Reserves
- Reservoir
- Reservoir host
- Residual air
- Residual volume
- Residue
- Resin
- Resistance
- Resistance factor
- Resolvase
- Resorption
- Resorption lacunae
- Resources
- Respiration
- Respiration rate
- Respiratory metabolism
- Respiratory substrate
- Respiratory system
- Respirometer
- Respondent conditioning
- Response
- Rest bite
- Resting cells
- Resting potential
- Resting tidal volume
- Restriction enzyme
- Restriction fragments
- Restriction point
- Rests of serres
- Resuscitation
- Retard
- Rete testis
- Retention
- Reticul-
- Reticular activating system
- Reticular connective tissue
- Reticular fiber
- Reticulated
- Reticuloendothelial system
- Retina
- Retrograde
- Retrotransposon
- Retrovirus
- Rev
- Reverberating circuit
- Reverse banding
- Reverse passive agglutination
- Reverse transcription
- Revertant
- Revolution
- Rh factor
- Rheotaxis
- Rhinalgia
- Rhinarium
- Rhizobium leguminosarum
- Rhizoids
- Rhizome
- Rhizophora
- Rhizopoda
- Rhodopsin
- Rib
- Ribonuclease
- Ribonucleic acid
- Ribonucleoside
- Ribonucleotide
- Ribose
- Ribosomal DNA
- Ribosomal ribonucleic acid
- Ribosome
- Ribozyme
- Rice
- Right fibrous trigone
- Right sagittal fissure
- Rigidity
- Rigor
- Ring test
- Ripe
- Rivet Hypothesis
- Rmv
- RNA virus
- RNA-dependent DNA polymerase
- Rod
- Roller
- Rollers nucleus
- Rolling circle mechanism
- Roof of mouth
- Room temperature
- Root
- Root cap
- Root cutting
- Root Hair
- Root nodules
- Root System
- Rose
- Rosette formation
- Rostrum
- Rostrum sphenoidale
- Rotary joint
- Rotatoria
- Rough endoplasmic reticulum
- Roughage
- Round heart
- Rovsings sign
- Rubisco
- Rudimentary
- Rudiments
- Rudp carboxylase
- Rue
- Ruffle
- Rummel tourniquet
- Runner
- Runt disease
- Rushes
- Rushton bodies
- Rust