[ ep-i-did-uh-mis ]
/ ˌɛp ɪˈdɪd ə mɪs /

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.
See also vas efferens.

Origin of epididymis

1600–10; < Greek epididymís; see epi-, didymous
Related formsep·i·did·y·mal, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for epididymides


/ (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 Formsepididymal, 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

Word Origin and History for epididymides



c.1600, "fleshy mass at the back of the testicles," Modern Latin, literally "that which is on the testicles," from Greek epididymis, a word probably coined by Greek anatomist Herophilus (c.300 B.C.E.) from epi "on" (see epi-) + didymos "testicle," literally "double, twofold" (adj.). "To save his Epididamies" [Richard Brome, "The Court Beggar," 1652].

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for epididymides


[ 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.