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epididymis

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ep⋅i⋅did⋅y⋅mis

[ep-i-did-uh-mis]
–noun, plural -di⋅dym⋅i⋅des [-di-dim-i-deez, -did-uh-mi-] . Anatomy.
an elongated organ on the posterior surface of a testis that constitutes the convoluted beginning of the vas deferens.

Origin:
1600–10; < Gk epididymís; see epi-, didymous


ep⋅i⋅did⋅y⋅mal, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2010.
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ep·i·did·y·mis   (ěp'ĭ-dĭd'ə-mĭs)   
n.   pl. ep·i·did·y·mi·des (-mĭ-dēz')
A long, narrow, convoluted tube, part of the spermatic duct system, that lies on the posterior aspect of each testicle, connecting it to the vas deferens.

[Greek epididumis : epi-, epi- + didumoi, twins, testicles, pl. of didumos, double; see dwo- in Indo-European roots.]
ep'i·did'y·mal adj.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

epididymis 
1610, "fleshy mass at the back of the testicles" (jocularly called a taint), Mod.L., lit. "that which is on the testicles," from Gk. epididymis, a word probably coined by Gk. anatomist Herophilus (c.300 B.C.E.) from epi "on" + didymos "testicle," lit. "double, twofold" (adj.). "To save his Epididamies" [1652].
Online Etymology Dictionary, © 2001 Douglas Harper
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Medical Dictionary

Main Entry: ep·i·did·y·mis
Pronunciation: "ep-&-'did-&-m&s
Function: noun
Inflected Form: plural ep·i·did·y·mi·des /-m&-"dEz/
: a system of ductules that emerges posteriorly from the testis, holds sperm during maturation, andforms a tangled mass before uniting into a single coiled duct which comprises the highly convoluted body and tail of the system and is continuous with the vas deferens —see VASA EFFERENTIAep·i·did·y·mal /-m&l/ adjective
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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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

epididymis

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

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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