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spermatogenesis

[spur-mat-uh-jen-uh-sis, spur-muh-tuh-]
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noun Biology.
  1. the origin and development of spermatozoa.

Origin of spermatogenesis

From New Latin, dating back to 1880–85; see origin at spermato-, -genesis
Related formssper·ma·to·ge·net·ic [spur-muh-toh-juh-net-ik, sper-mat-oh-] /ˌspɜr mə toʊ dʒəˈnɛt ɪk, spərˌmæt oʊ-/, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for spermatogenesis

Historical Examples

  • Spermatogenesis of Caloptenus femur-rubrum and Cicada tibicen.

    Studies in Spermatogenesis (Part 1 of 2)

    Nettie Maria Stevens


British Dictionary definitions for spermatogenesis

spermatogenesis

noun
  1. the formation and maturation of spermatozoa in the testisSee also spermatocyte (def. 1)
Derived Formsspermatogenetic (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

Word Origin and History for spermatogenesis

n.

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

Online Etymology Dictionary, © 2010 Douglas Harper

spermatogenesis in Medicine

spermatogenesis

(spər-măt′ə-jĕnĭ-sĭs, spûr′mə-tə-)
n.
  1. Formation and development of spermatozoa by meiosis and spermiogenesis.spermatocytogenesis
Related formssper•mat′o•ge•netic (-jə-nĕtĭk) null adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

spermatogenesis in Science

spermatogenesis

[spər-măt′ə-jĕnĭ-sĭs, spûr′mə-tə-]
  1. 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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.