/ ˌvæs ˈdefərenz; NAmE / noun
( pl. vasa def·er·en·tia / ˌveɪsə defəˈrenʃiə; NAmE /) ( anatomy ) the tube through which sperm pass from the testis on their way out of the body
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WORD ORIGIN
late 16th cent.: from vas + Latin deferens carrying away, present participle of deferre .