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metamerism

 - 4 dictionary results

me⋅tam⋅er⋅ism

  [muh-tam-uh-riz-uhm]
Use metamerism in a Sentence
–noun
1. Zoology.
a. division into metameres, the developmental process of somite formation.
b. existence in a metameric state.
2. Chemistry. isomerism resulting from the attachment of different groups to the same atom, as C2H5NHC2H5 and CH3NHC3H7.
Origin:
1840–50; (in def. 1) metamere + -ism; (in def. 2) meta- + (iso)merism
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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me·tam·er·ism   (mĭ-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® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: me·tam·er·ism
Pronunciation: m&-'tam-&-"riz-&m
Function: noun
1 : isomerism especially of chemicalcompounds of the same type
2 : the condition of having or the stage of evolutionary development characterized by a body made up of metamers that is usually held to be an essentialprelude to the differentiation of the more highly organized animals (as arthropods and vertebrates) through the disproportionate development and elaboration of some segments together with thecoalescence, reduction, or loss of others
3 : the phenomenon exhibited by pairs of color metamers metamerism in matching artificial with natural teeth>
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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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