Pronunciation: (fī-loj'u-nē), [key]
1. the development or evolution of a particular group of organisms.
2. the evolutionary history of a group of organisms, esp. as depicted in a family tree. Also,phy•lo•gen•e•sisPronunciation: (fī"lu-jen'u-sis). [key]Cf. ontogeny.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.