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Webster 1913 Edition
Metamerism
Me-tam′er-ism
,Noun.
1.
(Biol.)
The symmetry of a metameric structure; serial symmetry; the state of being made up of metameres.
2.
(Chem.)
The state or quality of being metameric; isomerism due to different bonding patterns in two substances having the same molecular formula. Contrasted with
steroisomerism
or optical isomerism
. Also, the relation or condition of metameric compounds.