Definition of vas deferens in US English:

vas deferens


  • The duct which conveys sperm from the testicle to the urethra.

    • ‘These ducts carry the secretions produced by the seminal vesicle and the vas deferens.’
    • ‘During sexual activity, the sperm travels from the epididymis to the vas deferens with other glandular secretions.’
    • ‘Both fallopian tubes and vas deferens have the ability to rejoin after separation although this is an extremely rare occurrence.’
    • ‘Men with congenital absence of the vas deferens, either unilateral or bilateral, may be carriers of cystic fibrosis.’
    • ‘Vasectomy works by using a clip to block the vas deferens, which connects the testicles to the urethra and keeps sperm out of the seminal fluid.’


Late 16th century: from vas + Latin deferens ‘carrying away’, present participle of deferre.


vas deferens