The Collaborative International Dictionary of English v.0.48:

Cuspid \Cus"pid\ (k[u^]s"p[i^]d), n. [See Cusp.] (Anat.)
   One of the canine teeth; -- so called from having but one
   point or cusp on the crown. See Tooth.
   [1913 Webster]

WordNet (r) 3.0 (2006):

cuspid
    n 1: one of the four pointed conical teeth (two in each jaw)
         located between the incisors and the premolars [syn:
         canine, canine tooth, eyetooth, eye tooth,
         dogtooth, cuspid]

Moby Thesaurus II by Grady Ward, 1.0:

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