In this article, discover a comprehensive list of science-related words that start with the letter “R” to enhance your vocabulary and understanding.
- Radiation- Emission of energy as electromagnetic waves.
- Radioactivity- The emission of ionizing particles.
- Radiocarbon- Radioactive isotope of carbon used in dating.
- Radiation- Transfer of energy through space.
- Radicle- The part of a plant embryo that develops into the primary root.
- Radius- A line segment from the center of a circle to any point on its circumference.
- Reagent- A substance used in chemical reactions to detect, measure, or create other substances.
- Recombination- The rearrangement of genetic material.
- Refraction- Bending of light as it passes from one medium to another.
- Regeneration- The process of renewal or repair of tissues or organs.
- Relativity- A theory by Einstein about the interrelation of time and space.
- Replication- The process of copying DNA in a cell.
- Resonance- The enhancement of energy at a natural frequency.
- Revolution- The movement of an object in an orbit around another object.
- Ribonucleic Acid (RNA)- A molecule essential for coding, decoding, regulation, and expression of genes.
- Richter Scale- A scale used to measure the magnitude of earthquakes.
- Ribonucleotide- A building block of RNA.
- Ribosome- A cellular structure that synthesizes proteins.
- Rift Valley- A large elongated depression with steep walls formed by the downward displacement of a block of the earth’s surface.
- Rifting- The process of the earth’s crust breaking apart.
- RNA Polymerase- An enzyme that produces RNA from a DNA template.
- Radio Telescope- An instrument used to detect radio waves from astronomical objects.
- Retrovirus- A type of virus that uses RNA as its genetic material.
- Rheology- The study of the flow of matter.
- Rhizome- A horizontal underground plant stem capable of producing the shoot and root systems of a new plant.
- Rhodopsin- A light-sensitive receptor protein found in the eye’s retina.
- Radiometric Dating- A method used to determine the age of an artifact by measuring its radioactive decay.
- Resilience- Ability of a material to absorb energy when deformed.
- Reservoir- A natural or artificial place where water is collected and stored.
- Reproductive System- The organs and glands in the body that aid in the production of new individuals.
- Rhombus- A four-sided shape with all sides having equal length.
- Ribozyme- An RNA molecule capable of acting as an enzyme.
- Riboflavin- A type of vitamin B2, essential for energy production.
- Radiograph- An image produced on a sensitive plate or film by X-rays.
- Radiosonde- A balloon-borne instrument used for measuring atmospheric parameters.
- Radiometer- An instrument for measuring the intensity or power of electromagnetic radiation.
- Rayleigh Scattering- Scattering of light or other electromagnetic radiation by particles much smaller than the wavelength of the radiation.
- Retrograde- Motion in the direction opposite to the rotation of the primary.
- Reflex- An involuntary and nearly instantaneous movement in response to a stimulus.
- Respiration- The process of inhaling oxygen and exhaling carbon dioxide.
- Radiolucent- Allowing the passage of X-rays or other radiation.
- Radiopaque- Impenetrable by X-rays or other radiation.
- Reaction- A process in which substances interact and change into different substances.
- Red Shift- A shift towards longer wavelengths of the spectral lines emitted by an object moving away from the observer.
- Recessive- A gene that gets masked by a dominant gene.
- Rectifier- An electrical device that converts alternating current to direct current.
- Redox Reaction- A chemical reaction involving the transfer of electrons between two species.
- Recombination DNA- DNA that has been formed artificially by combining constituents from different organisms.
- Retina- The light-sensitive layer at the back of the eyeball.
- Rheostat- A variable resistor which is used to control current.
- Reproduction- The process of producing new organisms.
- Resistor- A device used to introduce resistance into an electrical circuit.
- Recrystallization- A process that describes the change of structure of a material.
- Reporter Gene- Gene used as a marker in molecular biology experiments.
- Respiratory System- The system involved in the intake and exchange of oxygen and carbon dioxide.
- Retina- The light-sensitive layer at the back of the eyeball.
- Radula- A structure in the mouths of mollusks used for feeding.
- Rickets- A disease caused by Vitamin D deficiency that affects bone development in children.
- Rheumatoid Arthritis- An autoimmune disorder affecting the joints.
- Ribozyme- RNA that acts as an enzyme.
- Riemann Hypothesis- A conjecture about the distribution of prime numbers.
- Rod Cells- Photoreceptor cells in the retina of the eye.
- Retroreflector- A device that reflects light back to its source.
- Radiographic- Pertaining to the production of radiographs.
- Radiology- The science dealing with X-rays and other high-energy radiation.
- Rachis- The main axis of a compound structure, such as a feather or a plant.
- Radiant Energy- Energy that travels by waves or particles, particularly electromagnetic radiation.
- Rhodotaxis- Movement in response to red light.
- Rigor Mortis- The stiffening of the body after death.
- Rubella- A contagious viral infection preventable by vaccine.
- Radon- A radioactive gas that can cause lung cancer.
- Rostrum- A beak-like structure.
- Rugosity- The degree of roughness.
- Regolith- A layer of loose soil or debris covering solid rock.
- Radiosurgery- The use of precisely targeted radiation to treat tumors.
- Reovirus- A type of virus that infects the respiratory and gastrointestinal tracts.
- Receptor- A protein molecule that receives and responds to a signal.
- Rabies- A viral disease that causes inflammation of the brain.
- Raman Spectroscopy- Technique used to observe vibrational, rotational, and other low-frequency modes in a system.
- Resonator- A device or system that oscillates at specific frequencies.
- Rate Law- An equation that relates the reaction rate with the concentrations of reactants.
- Reactivity- How readily a substance undergoes a chemical reaction.
- Regeneration- The process of renewal or growth.
- Residual Volume- The volume of air remaining in the lungs after maximum exhalation.
- Radiolysis- The dissociation of molecules by radiation.
- Rickardite- A copper telluride mineral.
- Remission- A period during which the symptoms of a disease decrease.
- Rotary- Involving rotation.
- Rhabdoid- Rod-like in shape.
- Reluctance- The opposition to magnetic flux.
- Reverberation- The persistence of sound after the source has stopped.
- Runoff- Water that flows over the surface of the ground.
- Reflection- The bouncing back of light from a surface.
- Reaction Time- The time elapsed between a stimulus and the response.
- Residual Stress- Internal stresses in a material after it has been manufactured.
- Receptor Field- The specific part of the world to which a sensory-neuron responds.
- Root Cap- A section of tissue at the tip of a plant root.
- Ruhr- Large river in western Germany, site of major industries and mining.
- Rogowski Coil- A toroidal coil used to measure alternating current.
- Radiant Flux- The total power of electromagnetic radiation.