The Collaborative International Dictionary of English v.0.48:

Peregrine \Per"e*grine\ (p[e^]r"[-e]*gr[i^]n; 277), a. [L.
   peregrinus. See Pilgrim.]
   Foreign; not native; extrinsic or from without; exotic.
   [Spelt also pelegrine.] "Peregrine and preternatural heat."
   --Bacon.
   [1913 Webster]

   Peregrine falcon (Zool.), a courageous and swift falcon
      (Falco peregrinus), remarkable for its wide distribution
      over all the continents. The adult plumage is dark bluish
      ash on the back, nearly black on the head and cheeks,
      white beneath, barred with black below the throat. Called
      also peregrine hawk, duck hawk, game hawk, and
      great-footed hawk.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Duck \Duck\, n. [OE. duke, doke. See Duck, v. t. ]
   1. (Zool.) Any bird of the subfamily Anatin[ae], family
      Anatid[ae].
      [1913 Webster]

   Note: The genera and species are numerous. They are divided
         into river ducks and sea ducks. Among the former
         are the common domestic duck (Anas boschas); the wood
         duck (Aix sponsa); the beautiful mandarin duck of
         China (Dendronessa galeriliculata); the Muscovy duck,
         originally of South America (Cairina moschata). Among
         the sea ducks are the eider, canvasback, scoter, etc.
         [1913 Webster]

   2. A sudden inclination of the bead or dropping of the
      person, resembling the motion of a duck in water.
      [1913 Webster]

            Here be, without duck or nod,
            Other trippings to be trod.           --Milton.
      [1913 Webster]

   Bombay duck (Zool.), a fish. See Bummalo.

   Buffel duck, Spirit duck. See Buffel duck.

   Duck ant (Zool.), a species of white ant in Jamaica which
      builds large nests in trees.

   Duck barnacle. (Zool.) See Goose barnacle.

   Duck hawk. (Zool.)
      (a) In the United States: The peregrine falcon.
      (b) In England: The marsh harrier or moor buzzard.

   Duck mole (Zool.), a small aquatic mammal of Australia,
      having webbed feet and a bill resembling that of a duck
      (Ornithorhynchus anatinus). It belongs the subclass
      Monotremata and is remarkable for laying eggs like a bird
      or reptile; -- called also duckbill, platypus,
      mallangong, mullingong, tambreet, and water mole.


   To make ducks and drakes, to throw a flat stone obliquely,
      so as to make it rebound repeatedly from the surface of
      the water, raising a succession of jets; hence:

   To play at ducks and drakes, with property, to throw it
      away heedlessly or squander it foolishly and unprofitably.


   Lame duck. See under Lame.
      [1913 Webster]