Online Biology Dictionary

Definitions of biological and medical terminology

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EUGENE M. MCCARTHY, PHD GENETICS


Online Biology Dictionary is a free, concise, illustrated dictionary of biology and medicine. High school, college and medical students will all find this dictionary useful. The entries are listed alphabetically, which allows you to look up biology terms even if you're not sure about their spellings (or click here to use the dictionary's term finder). Terminology is added to this dictionary on an ongoing basis. To find the meaning of a term, click on its first letter here:

BIOLOGICAL TERMINOLOGY STARTING WITH:
A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U-Z


Notice: The terminology finder has been moved to a separate web page. To look up biology terms, please click here to access the finder at its new location.
Find the meanings of Greek and Latin roots >>
Find the meanings of prefixes and suffixes >>


QUICK LINKS TO POPULAR ARTICLES:
Acheulean tools >> Aegyptopithecus >>
Aerobic respiration>> Afar Depression >>
Ambulocetus >> Anaphase >>
Ardipithecus >> Australopithecines >>
Australopithecus afarensis >> Australopithecus africanus >>
Australopithecus anamensis >> Australopithecus bahrelghazali >>
Australopithecus garhi >> Australopithecus sediba >>
Black Widows >> Brown Recluse >>
Biology >> Binary Fission >>
Branches of Biology >> Calcium carbonate >>
Careers in Biology >> Cave art >>
Cell >> Centrioles >>
Centrosomes >> Chloroplasts >>
Chromoplasts >> Collagen>>
Cytokinesis >> Digestive System >>
Divergent evolution >> Dryopithecines >>
Endoplasmic reticulum >> Epithelium >>
Eubacteria >> Eukaryotic cell >>
Exocytosis >> Fluid mosaic model >>
Gigantopithecus >> Homo erectus >>
Homo georgicus >> Homo habilis >>
Homo neanderthalensis >> Hypertonic >>
Immunoglobulins >> Lamarck >>
Leucoplasts >> Leukocytes >>
Linnaeus>> Meiosis >>
Metaphase >> Mitosis >>
Natural selection >> Nitrogen cycle >>
Orrorin tugenensis >> Paranthropus aethiopicus >>
Paranthropus boisei >> Paranthropus robustus >>
Plasma membrane >> Pliny >>
Prophase >> Reduction division >>
Respiration >> Reverse transcriptase >>
Ruminant Stomach >> Sarcomere >>
Scala naturae >> Sahelanthropus tchadensis >>
Tardigrades >> Telophase >>


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Note: Definitions and explanations in this dictionary are updated on an ongoing basis to keep up with current trends and technology.


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