/ Dictionary / Index C commissurotomy: Meaning and Definition of Find definitions for: com•mis•sur•ot•o•my Pronunciation: (kom"u-shu-rot'u-mē), [key] — pl. -mies. the incision of a band of commissures, esp. of mitral fibers, to correct mitral stenosis. Cf. valvulotomy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. commissure commit Related Content Daily Word Quiz: eccentric Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language