List of Science Words That Start With A

Looking for science words that start with A? You’ve come to the right place.

From an Atom to Anti body, the subject I loved most at school – there are some awesome science-related words beginning with the letter A.

Here is a list with some words beginning with A that are commonly used in science:

Abiotic – non-living components of an ecosystem, such as rocks, soil, and water.

Acceleration – the rate at which an object changes its velocity over time.

Aerobic – a type of cellular respiration that requires oxygen to produce energy.

Allele – one of the different versions of a gene that exists at a specific location on a chromosome.

Amylase – an enzyme that breaks down carbohydrates into simpler sugars during digestion.

Atom – the basic unit of matter that is made up of a nucleus made up of protons and neutrons, with electrons orbiting around it.

Autotroph – an organism that can produce its own food through photosynthesis or chemosynthesis. An example of an autotroph are plants.

Adenosine – a nucleoside composed of adenine and ribose that is an important component of DNA and RNA.

Albedo – the reflectivity of a surface, typically of a planet or satellite.

Alkaline –  a substance that has a pH greater than 7 and is basic in nature.

Allelopathy – the ability of a plant to produce chemicals that inhibit the growth of other plants in its vicinity.

Alluvial – this to sediment or soil that has been deposited by a river or other water body.

Alpha particle – a type of ionizing radiation that consists of two protons and two neutrons and is emitted during radioactive decay.

Amine – a type of organic compound that contains a nitrogen atom bonded to one or more carbon atoms.

Ampere – the SI unit of electric current, defined as one coulomb of charge per second.

Anaerobic – a type of cellular respiration that does not require oxygen to produce energy.

Anemometer – a device used to measure wind speed and direction.

Anion – a negatively charged ion, formed when an atom gains one or more electrons.

Antigen – a molecule that triggers an immune response in the body, typically a protein or polysaccharide.

Aphelion – the point in the orbit of a planet or other celestial object where it is farthest from the sun.

Apoptosis – the programmed cell death that occurs in multicellular organisms, and is important for normal growth and development.

Archipelago – a group of islands that are close together, typically formed by volcanic activity.

Asexual reproduction – reproduction that does not involve the fusion of gametes, and results in offspring that are genetically identical to the parent.

Asteroid – a small, rocky object that orbits the sun, typically found in the asteroid belt between Mars and Jupiter.

Astrobiology – the study of life in the universe, including its origin, evolution, and distribution.

Astrometry – the measurement of the positions and motions of celestial objects, typically done using telescopes.

Atomic number – the number of protons in the nucleus of an atom, which determines its identity as a specific element.

Autosome – any chromosome that is not a sex chromosome and is present in both sexes.

Alternative splicing – the process by which different variations of a gene are produced by splicing its RNA in different ways.

Amplification – the process of increasing the number of copies of a DNA or RNA sequence through polymerase chain reaction (PCR) or other techniques.

Amplitude – the maximum displacement or distance moved by a wave from its equilibrium position.

Anaerobic – a process that occurs in the absence of oxygen, such as anaerobic respiration or fermentation.

Analyte – the substance being analyzed or detected in a chemical or biological assay.

Anaphase – the stage of mitosis or meiosis in which the sister chromatids of each chromosome are separated and pulled toward opposite poles of the cell.

Anatomy – the study of the structure and organization of living organisms and their parts.

Angiosperm – a flowering plant that produces seeds enclosed within an ovary.

Anion – a negatively charged ion that has gained one or more electrons.

Antenna – a sensory appendage found in many animals that detects and responds to environmental stimuli, such as light or sound.

Antibiotic – a substance that inhibits or kills bacteria or other microorganisms.

Antibody – a protein produced by the immune system that recognizes and binds to specific antigens, such as those found on viruses or bacteria.

Antigen – a molecule or substance that triggers an immune response, such as a protein on the surface of a virus or bacteria.

Antimatter – matter consisting of particles that have the same mass as ordinary particles, but with opposite charge, such as antiprotons or positrons.

Aorta – the largest artery in the human body, originating from the left ventricle of the heart and distributing oxygenated blood to the rest of the body.

Archaea – a group of single-celled microorganisms that are genetically distinct from bacteria and eukaryotes, and often found in extreme environments.

Arthropod – an invertebrate animal with an exoskeleton, a segmented body, and jointed appendages, such as insects, spiders, or crustaceans.

Artificial intelligence – the development of computer systems that can perform tasks that typically require human intelligence, such as learning, problem-solving, and decision-making.

Astigmatism – a common eye condition in which the cornea is curved asymmetrically, causing distorted or blurred vision.

Atmosphere – the layer of gases surrounding a planet, held in place by gravity, and responsible for protecting the planet from solar radiation and regulating its temperature.

Atomic mass – the mass of an atom, typically measured in atomic mass units (amu), equal to the number of protons and neutrons in the nucleus.

Atrium – one of the two upper chambers of the heart that receives blood from the veins and pumps it to the ventricles.

Autosome – any chromosome that is not a sex chromosome, found in both males and females and responsible for carrying genetic information unrelated to sex determination.

Axon – a long, slender projection of a neuron that conducts electrical impulses away from the cell body towards other neurons or muscle cells.

Azimuth – the horizontal angle between a reference point, such as north, and the direction to an object or location, used in navigation and astronomy.

I hope you found the words you were looking for from the list above.

This isn’t an exhaustive list, if there are any science words starting with the letter A that you would like added to the list, please leave me a comment below.