/ Dictionary / Index A amaranthaceous: Meaning and Definition of Find definitions for: am•a•ran•tha•ceous Pronunciation: (am"u-ran-thā'shus), [key] — adj. belonging to the plant family Amaranthaceae. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. amaranth amaranth family Related Content Daily Word Quiz: wary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language