Source : Webster's Revised Unabridged Dictionary (1913)

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

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

   3. (Zo["o]l.) The central portion of the armature of the
      pharynx in the Rotifera.

Source : WordNet®

incus
     n : the ossicle between the malleus and the stapes [syn: {anvil}]
     [also: {incudes} (pl)]