[ dahy-mer ]

  1. a molecule composed of two identical, simpler molecules.

  2. a polymer derived from two identical monomers.

Origin of dimer

First recorded in 1905–10; di-1 + -mer

Other words from dimer

  • di·mer·ic [dahy-mer-ik], /daɪˈmɛr ɪk/, adjective

Words Nearby dimer

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use dimer in a sentence

British Dictionary definitions for dimer


/ (ˈdaɪmə) /

  1. chem

    • a molecule composed of two identical simpler molecules (monomers)

    • a compound consisting of dimers

Origin of dimer

C20: from di- 1 + -mer

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

Scientific definitions for dimer


[ mər ]

  1. Any of various chemical compounds made of two smaller identical or similar molecules (called monomers) that are linked together. Dimers are linked by hydrogen bonds, coordinate bonds, or covalent bonds. Sucrose is a dimer composed of the monomers glucose and fructose.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.