/ Dictionary / Index N Neogene: Meaning and Definition of Find definitions for: Ne•o•gene Pronunciation: (nē'u-jēn"), [key] — Geol. Geol. —adj. 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. —n. the Neogene Period or System. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Neogaea neogenesis Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language