/ Dictionary / Index T theaceous: Meaning and Definition of Find definitions for: the•a•ceous Pronunciation: (thē-ā'shus), [key] — adj. belonging to the Theaceae, the tea family of plants. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Thea theanthropic Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language