/ Dictionary / Index O oleiferous: Meaning and Definition of Find definitions for: o•le•if•er•ous Pronunciation: (ō"lē-if'ur-us), [key] — adj. giving rise to oil, as certain seeds or hypha. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. oleic acid olein Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language