Ne•o•genePronunciation: (nē'u-jēn"), [key] Geol.
noting or pertaining to an interval of time corresponding to the Miocene and Pliocene epochs and accorded the status of a period when the Tertiary is considered an era. Cf. Paleogene.
the Neogene Period or System. Also,Neocene.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.