/ Dictionary / Index T terbia: Meaning and Definition of Find definitions for: ter•bi•a Pronunciation: (tûr'bē-u), [key] — n. Chem. an amorphous white powder, TbO. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. teratosis terbium 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