/ Dictionary / Index O oolith: Meaning and Definition of Find definitions for: o•o•lith Pronunciation: (ō'u-lith), [key] — n. Geol. any of the component concretions of a piece of oolite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oolite oology Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language