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Definition of: phylogeny
(fī·loj′ə·nē) noun Biol.
The history of the evolution of a species or group; tribal or racial history. Compare ONTOGENY. Also phy·lo·gen·e·sis (fī′lə·jen′ə·sis). [<G phylogenie <Gk. phylon a race + -geneia birth, origin <gen-, root of gignesthai be born]
—phy′lo·ge·net′ic (-jə·net′ik), phy′lo·gen′ic adjective
—phy′lo·ge·net′i·cal·ly adverb
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