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a combining form meaning “that which produces,” used in the formation of compound words:
endogen; hydrogen.
Also, -gene.
Origin of -gen
< French -gèneGreek -genēs born, produced; akin to Latin genus, kin Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for -gen


producing or that which produces: hydrogen
something produced: carcinogen
Word Origin
via French -gène, from Greek -genēs born
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 -gen

word-forming element technically meaning "something produced," but mainly, in modern use, "thing that produces or causes," from French -gène (18c.), from Greek -genes "born of, produced by," related to genos "birth" (see genus). Originally in late 18th century chemistry and probably reflecting misunderstanding of -genes, as though it meant "that which produces."

Online Etymology Dictionary, © 2010 Douglas Harper
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-gen in Medicine

-gen or -gene

  1. Producer: androgen.

  2. One that is produced: phosgene.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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