- A metallic runner with a frame shaped to fit the sole of a
shoe, -- made to be fastened under the foot, and used for moving
rapidly on ice. - Any one of numerous species of large, flat elasmobranch
fishes of the genus Raia, having a long, slender tail, terminated by a
small caudal fin. The pectoral fins, which are large and broad and
united to the sides of the body and head, give a somewhat rhombic form
to these fishes. The skin is more or less spinose.