‖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 ]
n. a cosmopolitan genus of usually perennial herbs with asterlike flowers; the leaves were formerly used medicinally, but now are only occasionally so used. Syn. -- genus Erigeron. [ WordNet 1.5 ]
(n) cosmopolitan genus of usually perennial herbs with flowers that resemble asters; leaves occasionally (especially formerly) used medicinally, Syn. genus Erigeron