Epididymis Definition
 ĕpĭ-dĭdə-mĭs 
  epididymides
  
    noun
  
 A long, oval-shaped structure attached to the rear upper surface of each testicle, consisting mainly of the sperm ducts of the testicles.
 Webster's New World 
Other Word Forms of Epididymis
Noun
Singular:
 epididymisPlural:
 epididymidesOrigin of Epididymis
-  Greek epididumis epi- epi- didumoi twins, testicles pl. of didumos double dwo- in Indo-European roots From American Heritage Dictionary of the English Language, 5th Edition 
- From Ancient Greek ἐπιδιδυμίς (epididymís), from ἐπί (epi, “upon, over”) + δίδυμος (didumos, “testicle”). - From Wiktionary 
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