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-mer

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Chemistry.
a combining form meaning “member of a particular group”: isomer.
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Compare -mere, -merous.

Origin of -mer

From the Greek word méros part, portion

Other definitions for -mer (2 of 2)

mer.

abbreviation
meridian.
meridional.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

WORDS THAT USE -MER

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.

Examples of -mer

An example of a word that features -mer is polymer, “a compound derived by the addition of many smaller molecules or by the condensation of many smaller molecules.” Polymer comes from Greek polymerḗs, which uses the equivalent form of -mer.

The first part of the word, poly-, is a combining form meaning “much, many.” The second part, -mer, means “part.” Polymer literally translates to “having many parts.”

What are some words that use the combining form -mer?

Break it down!

The combining form mono- means “single” or “one.” With this in mind, what does the term monomer literally mean?

How to use -mer in a sentence

British Dictionary definitions for -mer (1 of 2)

-mer

suffix forming nouns
chem denoting a substance of a particular classmonomer; polymer

Word Origin for -mer

from Greek meros part

British Dictionary definitions for -mer (2 of 2)

mer.

abbreviation for
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

Medical definitions for -mer (1 of 2)

mer-

pref.
Variant ofmero-

Medical definitions for -mer (2 of 2)

-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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