Glossary of terms used on this site

Glossary of biology.

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Glossaries

Term Main definition
A horizon
Glossaries - Biology glossary

consists of a mixture of organic material with inorganic products of weathering

abduction
Glossaries - Biology glossary

when a bone moves away from the midline of the body

abiotic
Glossaries - Biology glossary

nonliving components of the environment

above-ground biomass
Glossaries - Biology glossary

total mass of aboveground living plants per area

abscisic acid (ABA)
Glossaries - Biology glossary

plant hormone that induces dormancy in seeds and other organs

abscission
Glossaries - Biology glossary

physiological process that leads to the fall of a plant organ (such as leaf or petal drop)

absorption spectrum
Glossaries - Biology glossary

range of wavelengths of electromagnetic radiation absorbed by a given substance

abstract
Glossaries - Biology glossary

opening section of a scientific paper that summarizes the research and conclusions

Acanthostega
Glossaries - Biology glossary

one of the earliest known tetrapods

acclimatization
Glossaries - Biology glossary

alteration in a body system in response to environmental change

acellular
Glossaries - Biology glossary

lacking cells

acetyl CoA
Glossaries - Biology glossary

combination of an acetyl group derived from pyruvic acid and coenzyme A, which is made from pantothenic acid (a B-group vitamin)

acetylcholine
Glossaries - Biology glossary

neurotransmitter released by neurons in the central nervous system and peripheral nervous system

acetylcholinesterase
Glossaries - Biology glossary

(AChE) enzyme that breaks down ACh into acetyl and choline

acid
Glossaries - Biology glossary

molecule that donates hydrogen ions and increases the concentration of hydrogen ions in a solution

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