Incus

from WordNet (r) 3.0 (2006)

incus
    n 1: the ossicle between the malleus and the stapes [syn:
         {incus}, {anvil}]

from The Collaborative International Dictionary of English v.0.48

Incus \In"cus\, n. [L., anvil.]
   [1913 Webster]
   1. An anvil.
      [1913 Webster]

   2. (Anat.) One of the small bones in the tympanum of the ear;
      the anvil bone. See {Ear}.
      [1913 Webster]

   3. (Zool.) The central portion of the armature of the pharynx
      in the Rotifera.
      [1913 Webster]