epididymis

From Ancient Greek ἐπιδιδυμίς (epididumís), from ἐπί (epí, “upon, over”) + δίδυμος (dídumos, “twin; testicle”).

• IPA^(key): /ɛpiˈdɪdɪmɪs/

epididymis (plural epididymides or epididymises)

1. (anatomy) A narrow, tightly-coiled tube connecting the efferent ducts from the rear of each testicle to its vas deferens, where sperm are stored during maturation.
   • 2019, Bill Bryson, The Body: A Guide for Occupants, Black Swan (2020), page 332:

     Most men, I daresay, have never heard of their epididymis.

• Wolffian duct - embryological precursor
• internal genitalia

• epididymis on Wikipedia.Wikipedia

Learned borrowing from Ancient Greek ἐπιδιδυμίς (epididumís).

• (Classical Latin) IPA^(key): [ɛ.pɪˈdɪ.dy.mɪs]
• (modern Italianate Ecclesiastical) IPA^(key): [e.piˈd̪iː.d̪i.mis]

epididymis f (genitive epididymidis); third declension

1. (New Latin) epididymis

Third-declension noun.