vas def·er·ens /ˈvæsˈdɛfərənz, ˌrɛnz/
  vas def·er·ens /-ˈdɛfərənz, ˌrɛnz/ 名詞
  輸精管
  Vas n.; pl. Vasa   Anat. A vessel; a duct.
  Vas deferens; pl. Vasa deferentia.  Anat. The excretory duct of a testicle; a spermatic duct.
  ◄ ►
  vas deferens
       n : a duct that carries spermatozoa from the epididymis to the
           ejaculatory duct [syn: ductus deferens]