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-mer

1 American  
Chemistry.

  1. a combining form meaning “member of a particular group”.

    isomer.
mer. 2 American  

abbreviation

  1. meridian.

  2. meridional.

-mer 1 British  

suffix

  1. chem denoting a substance of a particular class

    monomer

    polymer
"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
mer. 2 British  

abbreviation

  1. meridian

"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

Usage

What does -mer mean? The combining form -mer is used like a suffix to mean “part,” specifically in reference to portions of molecules. It is often used in scientific terms, especially in chemistry.The form -mer comes from Greek méros, meaning “part, portion.” From this same source, we also get the combining forms -mere and -merous.Want to know more? Check out our Words That Use entries for both forms.

Etymology

Origin of -mer

From the Greek word méros part, portion

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.