Met`a*mer"ic (?), a. [Pref. meta- + Gr. &?; part.] 1. (Chem.) 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.

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

2. (Biol.) Of or pertaining to a metamere or its formation; as, metameric segmentation.