/ Dictionary / Index O oval window: Meaning and Definition of Find definitions for: o'val win'dow Pronunciation: [key] — Anat. Anat. an oval opening at the head of the cochlea, connecting the middle and inner ear, through which sound vibrations of the stapes are transmitted. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Oval Office ovarian Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language