Definition of vas deferens
plural vasa deferentia
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\ˈvā-zə-ˌde-fə-ˈren(t)-sh(ē-)ə\
: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
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