vas

vas

noun

{bc}an anatomical vessel {bc}{sx|duct||}

vas-

combining form

vas def*er*ens

noun

{bc}a sperm-carrying duct especially of a higher vertebrate that in the human male is a thick-walled tube about two feet (0.61 meters) long that begins at and is continuous with the tail of the epididymis and eventually joins the duct of the seminal vesicle to form the ejaculatory duct