vas deferens
Concise Oxford English Dictionary © 2008 Oxford University Press:
vas deferens /ˈdɛfərɛnz/
▶noun (pl. vasa deferentia /ˌdɛfəˈrɛnʃɪə/) Anatomy the duct which conveys sperm from the testicle to the urethra.
'vas deferens' also found in these Oxford entries:

