/ Dictionary / Index P Phanerozoic: Meaning and Definition of Find definitions for: Phan•er•o•zo•ic Pronunciation: (fan"ur-u-zō'ik), [key] — Geol. Geol. —n. the eon comprising the Paleozoic, Mesozoic, and Cenozoic eras. —adj. of or pertaining to this eon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phanerozoic (Thesaurus) phanerogam phano Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language