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WordReference Random House Unabridged Dictionary of American English © 2024me•tam•er•ism (mə tam′ə riz′əm),USA pronunciation n. - [Zool.]
- division into metameres, the developmental process of somite formation.
- existence in a metameric state.
- Chemistryisomerism resulting from the attachment of different groups to the same atom, as C2H5NHC2H5 and CH3NHC3H7.
- 1840–50; (in def. 1) metamere + -ism; (in def. 2) meta- + (iso)merism
Collins Concise English Dictionary © HarperCollins Publishers:: metamerism /mɪˈtæməˌrɪzəm/ n
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- a type of isomerism in which molecular structures differ by the attachment of different groups to the same atom, as in CH3OC3H7 and C2H5OC2H5
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