[ trahy-mer ]
/ ˈtraɪ mər /

noun Chemistry.

a molecule composed of three identical, simpler molecules.
a polymer derived from three identical monomers.
Compare oligomer.

Origin of trimer

First recorded in 1925–30, trimer is from the Greek word trimerḗs having three parts. See tri-, -mer


tri·mer·ic [trahy-mer-ik], /traɪˈmɛr ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for trimer

/ (ˈtraɪmə) /


a polymer or a molecule of a polymer consisting of three identical monomers

Derived forms of trimer

trimeric (traɪˈmɛrɪk), adjective
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 trimer

[ trīmər ]

Any of various chemical compounds made of three smaller identical or similar molecules (called monomers) that are linked together. Trimers are linked by hydrogen bonds, coordinate bonds, or covalent bonds. Raffinose is a trimer composed of the monomers glucose, fructose, and galactose.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.