/ Dictionary / Index E euphorbiaceous: Meaning and Definition of Find definitions for: eu•phor•bi•a•ceous Pronunciation: (y-fôr"bē-ā'shus), [key] — adj. belonging to the Euphorbiaceae, the spurge family of plants. Cf. spurge family. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. euphorbia euphoria Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language