1. <chemistry> Having the same elements united in the same proportion by weight, and with the same molecular weight, but possessing a different structure and different properties; as, methyl ether and ethyl alcohol are metameric compounds. See Isomeric.

The existence of metameric compounds is due to the different arrangement of the same constituents in the molecule.

2. <biology> Of or pertaining to a metamere or its formation; as, metameric segmentation.

Origin: Pref. Meta- + Gr. Part.

(01 Mar 1998)

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