/ Dictionary / Index T tithonia: Meaning and Definition of Find definitions for: ti•tho•ni•a Pronunciation: (ti-thō'nē-u, -thōn'yu), [key] — n. any of several tall composite plants of the genus Tithonia, native to Mexico and Central America, having yellow or orange-red ray flowers. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tithonia (Thesaurus) tithing titi Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language