/ Dictionary / Index Y ytterbia: Meaning and Definition of Find definitions for: yt•ter•bi•a Pronunciation: (i-tûr'bē-u), [key] — n. Chem. a colorless compound, YbO, used in certain alloys and ceramics. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. YTD ytterbium Related Content Daily Word Quiz: raconteur Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language