The Collaborative International Dictionary of English v.0.48:

Harpy \Har"py\ (h[aum]r"p[y^]), n.; pl. Harpies (-p[i^]z). [F.
   harpie, L. harpyia, Gr. "a`rpyia, from the root of "arpa`zein
   to snatch, to seize. Cf. Rapacious.]
   1. (Gr. Myth.) A fabulous winged monster, ravenous and
      filthy, having the face of a woman and the body of a
      vulture, with long claws, and the face pale with hunger.
      Some writers mention two, others three.
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            Both table and provisions vanished quite.
            With sound of harpies' wings and talons heard.
                                                  --Milton.
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   2. One who is rapacious or ravenous; an extortioner.
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            The harpies about all pocket the pool. --Goldsmith.
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   3. (Zool.)
      (a) The European moor buzzard or marsh harrier (Circus
          [ae]ruginosus).
      (b) A large and powerful, double-crested, short-winged
          American eagle (Thrasa["e]tus harpyia). It ranges
          from Texas to Brazil.
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   Harpy bat (Zool.)
      (a) An East Indian fruit bat of the genus Harpyia (esp.
          Harpyia cephalotes), having prominent, tubular
          nostrils.
      (b) A small, insectivorous Indian bat (Harpiocephalus
          harpia).

   Harpy fly (Zool.), the house fly.
      [1913 Webster] Harquebus

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.
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   2. A gold coin of the United States, of the value of ten
      dollars.
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   3. (Astron.) A northern constellation, containing Altair, a
      star of the first magnitude. See Aquila.
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   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.
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            Though the Roman eagle shadow thee.   --Tennyson.
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   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.
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   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.
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