vas deferens
noun /ˌvæs ˈdefərenz/
  /ˌvæs ˈdefərenz/
(plural vasa deferentia 
 (anatomy) /ˌveɪsə defəˈrenʃiə/
  /ˌveɪsə defəˈrenʃiə/
)- the tube through which sperm pass from the testis on their way out of the bodyWord Originlate 16th cent.: from vas + Latin deferens ‘carrying away’, present participle of deferre.