/ Dictionary / Index O olivine: Meaning and Definition of Find definitions for: ol•i•vine Pronunciation: (ol'u-vēn", ol"u-vēn'), [key] — n. any of a group of magnesium iron silicates, (Mg,Fe)SiO, occurring in olive-green to gray-green masses as an important constituent of basic igneous rocks. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: olivine (Thesaurus) Olivier olla* Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language