/ Dictionary / Index A amentaceous: Meaning and Definition of Find definitions for: am•en•ta•ceous Pronunciation: (am"un-tā'shus), [key] — adj. Bot. consisting of an ament. bearing aments. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: amentaceous (Thesaurus) ament amentia Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language