The Collaborative International Dictionary of English v.0.48:
Ray \Ray\, n. [F. raie, L. raia. Cf. Roach.] (Zool.)
(a) Any one of numerous elasmobranch fishes of the order
Raiae, including the skates, torpedoes, sawfishes, etc.
(b) In a restricted sense, any of the broad, flat,
narrow-tailed species, as the skates and sting rays. See
Bishop ray, a yellow-spotted, long-tailed eagle ray
(Aetobatus narinari syn. Stoasodon narinari) of the
Southern United States and the West Indies; also called
the spotted eagle ray and white-spotted eagle ray.
Butterfly ray, a short-tailed American sting ray
(Pteroplatea Maclura), having very broad pectoral fins.
Devil ray. See Sea Devil.
Eagle ray, any large ray of the family Myliobatidae, or
Aetobatidae. The common European species (Myliobatis
aquila) is called also whip ray, and miller.
Electric ray, or Cramp ray, a torpedo.
Starry ray, a common European skate (Raia radiata).
Sting ray, any one of numerous species of rays of the
family Trygonidae having one or more large, sharp,
barbed dorsal spines on the whiplike tail. Called also