keyhole

from WordNet (r) 3.0 (2006)

keyhole
    n 1: the hole where a key is inserted

from The Collaborative International Dictionary of English v.0.48

Keyhole \Key"hole`\, n.
   1. A hole or apertupe in a door or lock, for receiving a key.
      [1913 Webster]

   2.
      (a) (Carp.) A hole or excavation in beams intended to be
          joined together, to receive the key which fastens
          them.
      (b) (Mach.) a mortise for a key or cotter.
          [1913 Webster]

   {Keyhole limpet} (Zool.), a marine gastropod of the genus
      Fissurella and allied genera. See {Fissurella}.

   {Keyhole saw}, a narrow, slender saw, used in cutting
      keyholes, etc., as in doors; a kind of compass saw or fret
      saw.

   {Keyhole urchin} (Zool.), any one of numerous clypeastroid
      sea urchins, of the genera {Melitta}, {Rotula}, and
      {Encope}; -- so called because they have one or more
      perforations resembling keyholes.
      [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

28 Moby Thesaurus words for "keyhole":
      air hole, armhole, blowhole, bullet-hole, bunghole, cringle,
      deadeye, eye, eyelet, gasket, grommet, guide, knothole, loop,
      loophole, manhole, mousehole, peephole, pigeonhole, pinhole,
      placket, placket hole, porthole, punch-hole, spiracle, tap, vent,
      venthole