/ Dictionary / Index O oquassa: Meaning and Definition of Find definitions for: o•quas•sa Pronunciation: (ō-kwas'u, ō-kwä'su), [key] — pl. -sas, -sa. a small, dark-blue brook trout, Salvelinus oquassa, of Maine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -opy or 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