/ Dictionary / Index V vas efferens: Meaning and Definition of Find definitions for: vas ef•fer•ens Pronunciation: (vas' ef'u-renz", -ur-unz), [key] — pl. va•sa ef•fer•en•ti•a any of a number of short ducts that carry sperm from the testis to the epididymus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vasectomy Vaseline Related Content Daily Word Quiz: feral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language