epididymis

 
Pronunciation: /ˌɛpɪˈdɪdɪmɪs/

noun (plural epididymides /ˌɛpɪdɪˈdɪmɪdiːz/)

Anatomy
  • a highly convoluted duct behind the testis, along which sperm passes to the vas deferens.

Derivatives

epididymal

adjective

Origin:

early 17th century: from Greek epididumis, from epi 'upon' + didumos 'testicle' (from duo 'two')