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monomer

American  
[mon-uh-mer] / ˈmɒn ə mər /

noun

Chemistry.
  1. a molecule of low molecular weight capable of reacting with identical or different molecules of low molecular weight to form a polymer.


monomer British  
/ ˈmɒnəmə, ˌmɒnəˈmɛrɪk /

noun

  1. chem a compound whose molecules can join together to form a 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

monomer Scientific  
/ mŏnə-mər /
  1. A molecule that can combine with others of the same kind to form a polymer. Glucose molecules, for example, are monomers that can combine to form the polymer cellulose. Polymers can also be composed of different kinds of monomers.


Other Word Forms

Etymology

Origin of monomer

First recorded in 1910–15; mono- + -mer

Compare meaning

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Explanation

A monomer is a small molecule. When monomers connect to each other, they form a polymer, a chain of molecules. Imagine a set of beads that snap together, and you'll have a good idea of how monomers interlock. You can think of each monomer (which include fatty acids and amino acids) as a building block for larger molecules. The word monomer contains the Greek roots mono-, "one," and meros, "part."

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Vocabulary lists containing monomer

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Perhaps others in the area have stumbled upon the mysterious flute man themselves, or can recall the smell of monomer from a nail salon at the Redlands Mall.

From Los Angeles Times • Apr. 9, 2026

To address these limitations, the team designed what they call a fluorescent monomer controlled synthesis strategy.

From Science Daily • Feb. 13, 2026

Each unit in the chain is called a monomer, and linking these monomers creates a polymer.

From Science Daily • Dec. 15, 2025

Although it is like normal polyethylene, its monomer comes from ethanol instead of fossil fuels like petroleum and natural gas.

From Salon • Nov. 17, 2023

Every other glucose monomer in cellulose is flipped over and packed tightly as extended long chains.

From Textbooks • Apr. 25, 2013

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