/ Dictionary / Index O oca: Meaning and Definition of Find definitions for: o•ca Pronunciation: (ō'ku), [key] — n. a wood sorrel, Oxalis tuberosa, of the Andes, cultivated in South America for its edible tubers. a tuber of this plant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oca (Thesaurus) oc- Ocala Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language