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epididymis Line breaks: epi|didy¦mis
Pronunciation: /ˌɛpɪˈdɪdɪmɪs/

Definition of epididymis in English:

noun (plural epididymides ˌɛpɪdɪˈdɪmɪdiːz)

A highly convoluted duct behind the testis, along which sperm passes to the vas deferens.
Example sentences
  • Alongside the testicles are the epididymis and the vas deferens, which make up the duct system of the male reproductive organs.
  • The epididymis, rete testis, and spermatic cord were free of tumor.
  • During sexual activity, the sperm travels from the epididymis to the vas deferens with other glandular secretions.


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



Example sentences
  • In the present study, an increased incidence of both cystic hypoplasia of the rete testis and epididymal hypoplasia were observed.
  • The testis and epididymal remnant were delivered, and a single epididymal tubule was microsurgically isolated.
  • The epididymis is exposed through an incision in the scrotum, and then an operating microscope is used to dissect individual epididymal tubules.

Definition of epididymis in:

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Pronunciation: fɔːˈtɪsɪməʊ
(especially as a direction) very loud or loudly