[muh-tam-uh-riz-uh m]


  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.

Nearby words

  1. metamer,
  2. metameral,
  3. metamere,
  4. metameric,
  5. metameric nervous system,
  6. metamict,
  7. metamorphic,
  8. metamorphic facies,
  9. metamorphic rock,
  10. metamorphism

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. 2019

Examples from the Web for metamerism

British Dictionary definitions for metamerism



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

Medicine definitions for metamerism




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.