The Collaborative International Dictionary of English v.0.48:

Incisor \In*ci"sor\ (?; 277), n. [NL.] (Anat.)
   One of the teeth in front of the canines in either jaw; an
   incisive tooth. See Tooth.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Incisor \In*ci"sor\, a.
   Adapted for cutting; of or pertaining to the incisors;
   incisive; as, the incisor nerve; an incisor foramen; an
   incisor tooth.
   [1913 Webster]

WordNet (r) 3.0 (2006):

incisor
    n 1: a tooth for cutting or gnawing; located in the front of the
         mouth in both jaws

Moby Thesaurus II by Grady Ward, 1.0:

34 Moby Thesaurus words for "incisor":
   baby tooth, bicuspid, bucktooth, canine, crown, cuspid, cutter,
   deciduous tooth, dent, denticle, denticulation, dentil, dentition,
   dogtooth, eyetooth, fang, fore tooth, gagtooth, gang tooth,
   gold tooth, grinder, milk tooth, molar, peg, permanent tooth,
   pivot tooth, premolar, scrivello, snag, snaggletooth, tooth, tush,
   tusk, wisdom tooth