[see-muh n]
See more synonyms for semen on

Origin of semen

1350–1400; Middle English < Latin sēmen seed; akin to serere to sow1 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for semen


  1. the thick whitish fluid containing spermatozoa that is ejaculated from the male genital tract
  2. another name for sperm 1

Word Origin for semen

C14: from Latin: seed
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 semen

late 14c., from Latin semen "seed of plants, animals, or men; race, inborn characteristic; posterity, progeny, offspring," figuratively "origin, essence, principle, cause," from PIE *si-so-, reduplication of root *se- (1) "to sow" (cf. Latin serere "to sow," Old Prussian semen "seed," Lithuanian semens "seed of flax," Old Church Slavonic seme, Old High German samo "seed," German Same; see sow (v.)).

Online Etymology Dictionary, © 2010 Douglas Harper

semen in Medicine


  1. A viscous whitish secretion of the male reproductive organs, containing spermatozoa and consisting of secretions of the testes, seminal vesicles, prostate, and bulbourethral glands.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

semen in Science


  1. A thick, whitish fluid that is produced during ejaculation by male mammals and carries sperm cells.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

semen in Culture



The sticky white fluid produced in the male reproductive system that carries sperm.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.