Lyopomata

‖n. pl. [ NL., fr. Gr. &unr_; to loose + &unr_;, &unr_;, a lid. ] (Zool.) An order of brachiopods, in which the valves of shell are not articulated by a hinge. It includes the Lingula, Discina, and allied forms. [ Written also Lyopoma. ] [ 1913 Webster ]