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spermato-

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  1. a combining form meaning “seed”; used with this meaning and as a combining form of sperm1 in the formation of compound words: spermatogonium.
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Also especially before a vowel, spermat-.

Origin of spermato-

< Greek spermat- (stem of spérma; see sperm1) + -o-
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for spermato-

spermato-

spermo- before a vowel spermat- or sperm-

combining form
  1. indicating spermspermatogenesis
  2. indicating seedspermatophyte
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Word Origin

from Greek sperma, spermat-, seed; see sperm 1
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

spermato- in Medicine

spermato-

pref.
  1. Sperm:spermatic.
  2. Spermatozoon:spermatogenesis.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.