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spermatogenesis

[spur-mat-uh-jen-uh-sis, spur-muh-tuh-] /spɜrˌmæt əˈdʒɛn ə sɪs, ˌspɜr mə tə-/
noun, Biology
1.
the origin and development of spermatozoa.
Origin
1880-1885
1880-85; < New Latin; see spermato-, -genesis
Related forms
spermatogenetic
[spur-muh-toh-juh-net-ik, sper-mat-oh-] /ˌspɜr mə toʊ dʒəˈnɛt ɪk, spərˌmæt oʊ-/ (Show IPA),
adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for spermatogenetic

spermatogenesis

/ˌspɜːmətəʊˈdʒɛnɪsɪs/
noun
1.
the formation and maturation of spermatozoa in the testis See also spermatocyte (sense 1)
Derived Forms
spermatogenetic (ˌspɜːmətəʊdʒəˈnɛtɪk) adjective
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 spermatogenetic

spermatogenesis

n.

1877, earlier in German, from comb. form of Greek sperma (see sperm) + genesis.

Online Etymology Dictionary, © 2010 Douglas Harper
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spermatogenetic in Medicine

spermatogenesis sper·mat·o·gen·e·sis (spər-māt'ə-jěn'ĭ-sĭs, spûr'mə-tə-)
n.
Formation and development of spermatozoa by meiosis and spermiogenesis. Also called spermatocytogenesis.


sper·mat'o·ge·net'ic (-jə-nět'ĭk) or sper·mat'o·gen'ic (-jěn'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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spermatogenetic in Science
spermatogenesis
  (spər-māt'ə-jěn'ĭ-sĭs, spûr'mə-tə-)   
The formation and development of spermatozoa. Spermatogenesis in humans begins with the spermatogonium, the diploid cell that undergoes mitosis to form new spermatogonia as well as cells called primary spermatocytes. Each primary spermatocyte then undergoes the first meiotic division to produce two secondary spermatocytes. Each secondary spermatocyte undergoes the second meiotic division to produce two nonmotile cells called spermatids. The four spermatids then develop flagella and become sperm. Since some of the original spermatogonia replace themselves, the males are able to produce large numbers of sperm continuously after sexual maturity.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for spermatogenetic

spermatogenesis

the origin and development of the sperm cells within the male reproductive organs, the testes. The testes are composed of numerous thin, tightly coiled tubules known as the seminiferous tubules; the sperm cells are produced within the walls of the tubules. Within the walls of the tubules, also, are many randomly scattered cells, called Sertoli cells, that function to support and nourish the immature sperm cells by giving them nutrients and blood products. As the young germ cells grow, the Sertoli cells help to transport them from the outer surface of the seminiferous tubule to the central channel of the tubule.

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