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[TA] the excretory duct of the testis, which unites with the excretory duct of the seminal vesicle to form the ejaculatory duct. It has been divided into four parts: scrotal, funicular, inguinal, and pelvic (see pars scrotalis, pars funicularis, pars inguinalis, and pars pelvica ductus deferentis). Called also vas deferens, spermatic duct, and testicular duct.
Medical dictionary. 2011.