noun Chemistry.
a molecule composed of two identical, simpler molecules.
a polymer derived from two identical monomers.
Compare oligomer.

1905–10; di-1 + -mer

dimeric [dahy-mer-ik] , adjective
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World English Dictionary
dimer (ˈdaɪmə)
 a.  a molecule composed of two identical simpler molecules (monomers)
 b.  a compound consisting of dimers
[C20: from di-1 + -mer]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

dimer di·mer (dī'mər)

  1. A molecule consisting of two identical simpler molecules.

  2. A chemical compound consisting of such molecules.

di·mer'ic (dī-měr'ĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
dimer   (dī'mər)  Pronunciation Key 
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 © 2002. Published by Houghton Mifflin. All rights reserved.
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