/ Dictionary / Index A apiaceous: Meaning and Definition of Find definitions for: a•pi•a•ceous Pronunciation: (ā"pē-ā'shus), [key] — adj. belonging to the Apiaceae, an alternative name for the plant family Umbelliferae. Cf. parsley (def. 4). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Apia apian Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language