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epididymis

[ep-i-did-uh-mis] /ˌɛp ɪˈdɪd ə mɪs/
noun, plural epididymides
[ep-i-di-dim-i-deez, -did-uh-mi-] /ˌɛp ɪ dɪˈdɪm ɪˌdiz, -ˈdɪd ə mɪ-/ (Show IPA).
Anatomy
1.
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
1600-1610
1600-10; < Greek epididymís; see epi-, didymous
Related forms
epididymal, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for epididymis

epididymis

/ˌɛpɪˈdɪdɪmɪs/
noun (pl) -didymides (-dɪˈdɪmɪˌdiːz)
1.
(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
epididymal, adjective
Word Origin
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
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Word Origin and History for epididymis
n.

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
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epididymis in Medicine

epididymis ep·i·did·y·mis (ěp'ĭ-dĭd'ə-mĭs)
n. pl. ep·i·di·dy·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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Encyclopedia Article for epididymis

epididyme

either of a pair of elongated crescent-shaped structures attached to each of the two male reproductive organs, the testes (see testis). Sperm cells produced in the testes are transported to the epididymes, where they mature and are stored. Each epididymis has three regions, called, respectively, the head, body, and tail. The head is the uppermost and largest part of the epididymis; it lies on the top surface of the testis. The body is attached to the anal side of the testis and extends the length of the gland. The smallest region is the tail, which begins at the point of separation of the epididymis from the testis. Sperm cells mature primarily in the head and body of the epididymis and are stored in the tail

Learn more about epididyme with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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