METAMERIC

Met′a‐mer″ic (?), a. [[Pref. meta- + Gr. � part.]] 1. 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.
☞ The existence of metameric compounds is due to the different arrangement of the same constituents in the molecule. 2. 2. (Biol.) Of or pertaining to a metamere or its formation; as, metameric segmentation.