noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   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.

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

2. 2
   a convoluted tubule in each testis; carries sperm to vas deferens wordnet

Synonyms

All synonyms

paratesticlesperm sac

Example

More examples

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

Etymology

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

Related phrases

efferent ductvas deferens

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.