[ muh-tam-uh-riz-uh m ]
/ məˈtæm əˌrɪz əm /


  1. division into metameres, the developmental process of somite formation.
  2. existence in a metameric state.
Chemistry. isomerism resulting from the attachment of different groups to the same atom, as C2H5NHC2H5 and CH3NHC3H7.


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Origin of metamerism

1840–50; (in def 1) metamere + -ism; (in def 2) meta- + (iso)merism Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for metamerism

British Dictionary definitions for metamerism

/ (mɪˈtæməˌrɪzəm) /


Also called: metameric segmentation, segmentation the division of an animal into similar segments (metameres). In many vertebrates it is confined to the embryonic nervous and muscular systems
chem a type of isomerism in which molecular structures differ by the attachment of different groups to the same atom, as in CH 3 OC 3 H 7 and C 2 H 5 OC 2 H 5
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 metamerism

[ mə-tămə-rĭz′əm ]


The condition of having the body divided into metameres, exhibited in most animals only in the early embryonic stages of development.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.