%metamer%

n. [ Pref. meta- + -mere. ] (Biol.) One of successive or homodynamous parts in animals and plants; one of a series of similar parts that follow one another in a vertebrate or articulate animal, as in an earthworm; a segment; a somite. See Illust. of Loeven's larva. [ 1913 Webster ]

a. [ Pref. meta- + Gr. &unr_; part. ] 1. (Chem.) Having the same molecular formula, but possessing a different bonding structure and different properties; as, methyl ether and ethyl alcohol are metameric compounds. See Isomeric. [ 1913 Webster ]

☞ The existence of metameric compounds is due to different arrangements of the same atoms in the molecule. [ 1913 Webster ]

2. (Biol.) Of or pertaining to a metamere or its formation; as, metameric segmentation. [ 1913 Webster ]

adv. In a metameric manner. [ 1913 Webster ]