/ Dictionary / Index P phylogeny: Meaning and Definition of Find definitions for: phy•log•e•ny Pronunciation: (fī-loj'u-nē), [key] — n. the development or evolution of a particular group of organisms. the evolutionary history of a group of organisms, esp. as depicted in a family tree. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phylogeny (Thesaurus) phylogenetic classification phylon Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language