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metamerism

[muh-tam-uh-riz-uh m] /məˈtæm əˌrɪz əm/
noun
1.
Zoology.
  1. division into metameres, the developmental process of somite formation.
  2. existence in a metameric state.
2.
Chemistry. isomerism resulting from the attachment of different groups to the same atom, as C 2 H 5 NHC 2 H 5 and CH 3 NHC 3 H 7 .
Origin
1840-1850
1840-50; (in def 1) metamere + -ism; (in def 2) meta- + (iso)merism
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for metamerism

metamerism

/mɪˈtæməˌrɪzəm/
noun
1.
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
2.
(chem) a type of isomerism in which molecular structures differ by the attachment of different groups to the same atom, as in CH3OC3H7 and C2H5OC2H5
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
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metamerism in Medicine

metamerism me·tam·er·ism (mə-tām'ə-rĭz'əm)
n.
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.
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