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]