/ Dictionary / Index A -acea: Meaning and Definition of Find definitions for: -acea Pronunciation: [key] — Zool. Zool. a suffix used in the formation of names of classes and orders: Crustacea. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ace -aceae Related Content Daily Word Quiz: garrulous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language