/ Dictionary / Index O oolite: Meaning and Definition of Find definitions for: o•o•lite Pronunciation: (ō'u-līt"), [key] — n. Geol. a limestone composed of minute rounded concretions resembling fish roe, in some places altered to ironstone by replacement with iron oxide. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oolachan oolith 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