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
       Skate.
       [1913 Webster]

   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
      stingaree.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Eagle \Ea"gle\, n. [OE. egle, F. aigle, fr. L. aquila; prob.
   named from its color, fr. aquilus dark-colored, brown; cf.
   Lith. aklas blind. Cf. Aquiline.]
   1. (Zo["o]l.) Any large, rapacious bird of the Falcon family,
      esp. of the genera Aquila and Hali[ae]etus. The eagle
      is remarkable for strength, size, graceful figure,
      keenness of vision, and extraordinary flight. The most
      noted species are the golden eagle (Aquila
      chrysa["e]tus); the imperial eagle of Europe (Aquila
      mogilnik or Aquila imperialis); the American bald eagle
      (Hali[ae]etus leucocephalus); the European sea eagle
      (Hali[ae]etus albicilla); and the great harpy eagle
      (Thrasaetus harpyia). The figure of the eagle, as the
      king of birds, is commonly used as an heraldic emblem, and
      also for standards and emblematic devices. See Bald
      eagle, Harpy, and Golden eagle.
      [1913 Webster]

   2. A gold coin of the United States, of the value of ten
      dollars.
      [1913 Webster]

   3. (Astron.) A northern constellation, containing Altair, a
      star of the first magnitude. See Aquila.
      [1913 Webster]

   4. The figure of an eagle borne as an emblem on the standard
      of the ancient Romans, or so used upon the seal or
      standard of any people.
      [1913 Webster]

            Though the Roman eagle shadow thee.   --Tennyson.
      [1913 Webster]

   Note: Some modern nations, as the United States, and France
         under the Bonapartes, have adopted the eagle as their
         national emblem. Russia, Austria, and Prussia have for
         an emblem a double-headed eagle.
         [1913 Webster]

   Bald eagle. See Bald eagle.

   Bold eagle. See under Bold.

   Double eagle, a gold coin of the United States worth twenty
      dollars.

   Eagle hawk (Zo["o]l.), a large, crested, South American
      hawk of the genus Morphnus.

   Eagle owl (Zo["o]l.), any large owl of the genus Bubo,
      and allied genera; as the American great horned owl (Bubo
      Virginianus), and the allied European species (B.
      maximus). See Horned owl.

   Eagle ray (Zo["o]l.), any large species of ray of the genus
      Myliobatis (esp. M. aquila).

   Eagle vulture (Zo["o]l.), a large West African bid
      (Gypohierax Angolensis), intermediate, in several
      respects, between the eagles and vultures.
      [1913 Webster]

WordNet (r) 3.0 (2006):

eagle ray
    n 1: powerful free-swimming tropical ray noted for `soaring' by
         flapping winglike fins; usually harmless but has venomous
         tissue near base of the tail as in stingrays