/ Dictionary / Index O ovisac: Meaning and Definition of Find definitions for: o•vi•sac Pronunciation: (ō'vu-sak"), [key] — n. Zool. a sac or capsule containing an ovum or ova. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ovipositor OV language Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language