/ Dictionary / Index O oolachan: Meaning and Definition of Find definitions for: oo•la•chan Pronunciation: ('lu-kän"), [key] — pl. -chans, -chan. eulachon. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ookinesis oolite 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