%epimer%

a. (Zoöl.) Pertaining to the epimera. [ 1913 Webster ]

n. [ Epi- + -mere. ] (Biol.) One of the segments of the transverse axis, or the so called homonymous parts; as, for example, one of the several segments of the extremities in vertebrates, or one of the similar segments in plants, such as the segments of a segmented leaf. Syd. Soc. Lex. [ 1913 Webster ]

‖n.; pl. Epimera [ NL., fr. Gr. 'epi` upon + &unr_; a part. ] (Zoöl.) (a) In crustaceans: The part of the side of a somite external to the basal joint of each appendage. See Illust. under Crustacea. (b) In insects: The lateral piece behind the episternum. [ Written also epimerum. ] [ 1913 Webster ]