Explore science words that start with r.
Science Words that Start With R
Here are 100 science words that start with “R”:
- Radiation
- Reaction
- Reproduction
- Respiration
- Ribosome
- Resistance
- Redox
- RNA
- Refraction
- Reactant
- Radioactive
- Recessive
- Resonance
- Retrovirus
- Replication
- Receptor
- Rhythm
- Rheology
- Renal
- Regeneration
- Radial
- Radiometer
- Radiology
- Ribonucleotide
- Ribonuclease
- Rheumatoid
- Ruminant
- Retrograde
- Retrotransposon
- Reticulum
- Radon
- Renin
- Rosetta
- Rhizosphere
- Renormalization
- Retroviral
- Reagent
- Red blood cell
- Ribosomal RNA (rRNA)
- Rubisco
- Renal failure
- Ribozyme
- Recombination
- Reaction rate
- Radioisotope
- Ribonucleic acid
- Radiography
- Ribose
- Repressor
- Redox reaction
- Radiofrequency
- Reproductive system
- Resting potential
- Renal artery
- Retroviral vector
- Rumen
- RNA interference
- Radial symmetry
- Renal tubule
- Reaction mechanism
- Rheumatology
- Rickettsia
- Radiolabeling
- Ruminant digestion
- Repressor protein
- Replication fork
- Retina
- Reactivity
- Reproductive organ
- Rh factor
- Ribosomal subunit
- Radiopaque
- Rhabdomyosarcoma
- Radiopharmaceutical
- Random sample
- Resting state
- Radioimmunoassay
- Rubella
- Replicative form
- Refractive index
- Ribonucleotide reductase
- RNA polymerase
- Renal cortex
- Regenerative medicine
- Root
- Renal pelvis
- Reticular formation
- Retrospective study
- Radiotherapy
- Radial velocity
- Rhizome
- Reverse transcription
- Recessive allele
- Respiratory system
- Renal function
- Rhodopsin
- Rumen fermentation
- Rhythmogenesis
- Ribozygosity
Related: Science Words A to Z
Science Words That Start With R (By Grade)
Science Words That Start With R (4th Grade):
- Rock
- Rain
- River
- Root
- Rotation
- Rainbow
- Reptile
- Refraction
- Respiratory
- Radiate
- Recharge
- Ruler
- React
- Reflection
- Rust
- Rebound
- Rodent
- Ruby
- Rhythm
- Reptilian
Science Words That Start With R (5th Grade):
- Rock cycle
- Rainforest
- River ecosystem
- Root system
- Rotation
- Rainbow spectrum
- Reptilian species
- Refraction of light
- Respiratory system
- Radiant energy
- Renewable resources
- Ruler measurement
- Reactivity
- Reflection of sound
- Rust corrosion
- Rebound effect
- Rodent species
- Ruby gemstone
- Rhythm synchronization
- Resistance (electrical)
Science Words That Start With R (6th Grade):
- Rock formation
- Renewable energy
- Reproductive system
- Respiration rate
- Rotation axis
- Rain gauge
- Rheology
- Redox reaction
- Ribonucleic acid (RNA)
- Radiometric dating
- Reflex arc
- Ribosome
- Recombinant DNA
- Relative humidity
- Respiratory quotient
- Radioactive decay
- Rhizosphere
- Refractive index
- Rutherford scattering
- Radiology
Science Words That Start With R (7th Grade):
- Resilience
- Radiometric dating methods
- RNA interference
- Reproductive isolation
- Restriction enzyme
- Ribosomal RNA
- Reactive oxygen species
- Rheumatoid arthritis
- Radioisotope
- Recombinant protein
- Randomized controlled trial
- Ribonucleotide reductase
- Radial symmetry
- Renewable fuel
- RNA splicing
- Raman spectroscopy
- Red blood cell
- Reverse osmosis
- Retrovirus
- Radiosensitivity
Science Words That Start With R (8th Grade):
- Retrotransposon
- Renal physiology
- Ribozyme
- RNA sequencing
- Reproductive cloning
- Radiopharmaceutical
- Receptor tyrosine kinase
- Ribulose bisphosphate
- Riemann hypothesis
- Red giant star
- Regenerative medicine
- Reverse transcriptase
- Radial velocity
- RNA polymerase
- Recombinant DNA technology
- Ribosomal protein
- Radioactive isotope
- Resonance structure
- Rheological behavior
- Radiative forcing
Science Words Starting With R (By Subject)
Physics Words That Start With R:
- Radiation
- Refraction
- Resistance
- Relativity
- Rotation
- Radioactivity
- Resonance
- Redshift
- Reversible
- Rutherford
- Refractive index
- Rigid body
- Radiant energy
- Reactor
- Rest mass
- Radial velocity
- Raman effect
- Rayleigh scattering
- Reaction rate
- Radiative cooling
Chemistry Words That Start With R:
- Reactant
- Reduction
- Reactivity
- Radical
- Reactor
- Redox
- Resonance
- Rust
- Ring
- Reaction rate
- Reagent
- Reaction mechanism
- Ribosome
- Regioselectivity
- Rearrangement
- Reflux
- Rosin
- Rancidity
- Retro-aldol reaction
- Riboflavin
Biology Words That Start With R:
- Ribosome
- Reproduction
- Respiration
- RNA
- Replication
- Receptor
- Resilience
- Reproductive system
- Retrovirus
- Recessive
- Reflex
- Renal
- Rumen
- Rhizome
- Retina
- Reticulum
- Reptile
- RNA interference (RNAi)
- Rhodopsin
- Root
Math Words That Start With R:
- Ratio
- Radical
- Real numbers
- Rational number
- Regression
- Range
- Rotation
- Root
- Radius
- Rectangular coordinates
- Radian
- Residue
- Random variable
- Reflection
- Riemann sum
- Rotation matrix
- Relative frequency
- Rational function
- Right angle
- Rounding
Physical Science Words That Start With R:
- Radiation
- Refraction
- Radioactivity
- Reactivity
- Redshift
- Resistance
- Rutherford scattering
- Resonance
- Refractive index
- Radiant energy
Science Words Beginning with R with Meaning:
- Reproduction: Process of producing offspring.
- Respiration: Cellular process for energy production.
- RNA: Ribonucleic acid, essential for protein synthesis.
- Rotation: Circular movement around an axis.
- Refraction: Bending of light as it passes through different mediums.
- Rainforest: Dense forest with high rainfall and biodiversity.
- Renewable: Resource capable of natural regeneration or replenishment.
- Revolution: Orbital motion of a celestial body around another.
- Redshift: Phenomenon of light moving away, causing a shift to longer wavelengths.
- Radiant: Emitting light or energy.
- Recessive: Genetic trait masked by a dominant allele.
- Resilience: Ability to recover from challenges or adversity.
- Rhombus: Quadrilateral with all sides equal in length.
- Rotation: Circular movement around an axis.
- Relative: Considered in relation to something else.
- Rust: Oxidation of iron or steel, forming a reddish-brown coating.
- Regeneration: Process of renewing or regrowing damaged tissue.
- Raptor: Bird of prey, like eagles or hawks.
- Ribosome: Cell organelle involved in protein synthesis.
- Reflection: Bouncing back of light or sound waves from a surface.
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