[ ep-i-did-uh-mis ]
/ ˌɛp ɪˈdɪd ə mɪs /
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noun, plural ep·i·di·dym·i·des [ep-i-di-dim-i-deez, -did-uh-mi-]. /ˌɛp ɪ dɪˈdɪm ɪˌdiz, -ˈdɪd ə mɪ-/. Anatomy.

an elongated organ on the posterior surface of a testis that stores sperm while they mature and constitutes the convoluted beginning of the vas deferens.



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See also vas efferens.

Origin of epididymis

1600–10; <Greek epididymís;see epi-, didymous


ep·i·did·y·mal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

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British Dictionary definitions for epididymis

/ (ˌɛpɪˈdɪdɪmɪs) /

noun plural -didymides (-dɪˈdɪmɪˌdiːz)

anatomy a convoluted tube situated along the posterior margin of each testis, in which spermatozoa are stored and conveyed to the vas deferens

Derived forms of epididymis

epididymal, adjective

Word Origin for epididymis

C17: from Greek epididumis, from epi- + didumos twin, testicle; see didymous
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for epididymis

[ ĕp′ĭ-dĭdə-mĭs ]

n. pl. ep•i•did•y•mi•des (-mĭ-dēz′)

A long, narrow, convoluted tube in the spermatic duct system that lies on the posterior aspect of each testicle and connects with the vas deferens.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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