/ Dictionary / Index T thulia: Meaning and Definition of Find definitions for: thu•li•a Pronunciation: (th'lē-u), [key] — n. Chem. a dense, greenish-white powder, TmO, that on gentle heating exhibits a reddish incandescence: used in the manufacture of thulium metal. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Thule thulium Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language