The Collaborative International Dictionary of English v.0.48:

Mole \Mole\, n. [OE. molle, either shortened fr. moldwerp, or
   from the root of E. mold soil: cf. D. mol, OD. molworp. See
   Moldwarp.]
   1. (Zool.) Any insectivore of the family Talpidae. They
      have minute eyes and ears, soft fur, and very large and
      strong fore feet.
      [1913 Webster]

   Note: The common European mole, or moldwarp (Talpa
         Europaea), is noted for its extensive burrows. The
         common American mole, or shrew mole (Scalops
         aquaticus), and star-nosed mole (Condylura cristata)
         have similar habits.
         [1913 Webster]

   Note: In the Scriptures, the name is applied to two
         unindentified animals, perhaps the chameleon and mole
         rat.
         [1913 Webster]

   2. A plow of peculiar construction, for forming underground
      drains. [U.S.]
      [1913 Webster]

   3. (fig.)A spy who lives for years an apparently normal life
      (to establish a cover) before beginning his spying
      activities.
      [PJC]

   Duck mole. See under Duck.

   Golden mole. See Chrysochlore.

   Mole cricket (Zool.), an orthopterous insect of the genus
      Gryllotalpa, which excavates subterranean galleries, and
      throws up mounds of earth resembling those of the mole. It
      is said to do damage by injuring the roots of plants. The
      common European species (Gryllotalpa vulgaris), and the
      American (Gryllotalpa borealis), are the best known.

   Mole rat (Zool.), any one of several species of Old World
      rodents of the genera Spalax, Georychus, and several
      allied genera. They are molelike in appearance and habits,
      and their eyes are small or rudimentary.

   Mole shrew (Zool.), any one of several species of
      short-tailed American shrews of the genus Blarina, esp.
      Blarina brevicauda.

   Water mole, the duck mole.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Water mole \Wa"ter mole`\ (Zool.)
   (a) The shrew mole. See under Shrew.
   (b) The duck mole. See under Duck.
       [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]