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a combining form meaning “member of a particular group”:
Compare -mere, -merous.
Origin of -mer
From the Greek word méros part, portion Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for -mer


(chem) denoting a substance of a particular class: monomer, polymer
Word Origin
from Greek meros part
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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-mer in Medicine

-mer suff.
Variant of -mere.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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-mer in Science
-mere or -mer  
A suffix meaning "part" or "segment," as in blastomere, one of the cells that form a blastula.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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