The Collaborative International Dictionary of English v.0.48:

Canine \Ca*nine"\, n. (Anat.)
   A canine tooth.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Canine \Ca*nine"\, a. [L. caninus, fr. canis dog: cf. F. canin.
   See Hound.]
   1. Of or pertaining to the family Canid[ae], or dogs and
      wolves; having the nature or qualities of a dog; like that
      or those of a dog.
      [1913 Webster]

   2. (Anat.) Of or pertaining to the pointed tooth on each side
      the incisors.
      [1913 Webster]

   Canine appetite, a morbidly voracious appetite; bulimia.

   Canine letter, the letter r. See R.

   Canine madness, hydrophobia.

   Canine tooth, a tooth situated between the incisor and
      bicuspid teeth, so called because well developed in dogs;
      usually, the third tooth from the front on each side of
      each jaw; an eyetooth, or the corresponding tooth in the
      lower jaw.
      [1913 Webster]

WordNet (r) 3.0 (2006):

canine
    adj 1: of or relating to a pointed conical tooth [syn: canine,
           laniary]
    2: of or relating to or characteristic of members of the family
       Canidae
    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]
    2: any of various fissiped mammals with nonretractile claws and
       typically long muzzles [syn: canine, canid]

Moby Thesaurus II by Grady Ward, 1.0:

90 Moby Thesaurus words for "canine":
   Seeing Eye dog, amphibian, aquatic, baby tooth, bandog, bicuspid,
   biped, bitch, bowwow, bucktooth, cannibal, carnivore, cosmopolite,
   crown, cuspid, cutter, deciduous tooth, dent, denticle,
   denticulation, dentil, dentition, dog, doggy, dogtooth, eyetooth,
   fancy dog, fang, feline, fore tooth, foxlike, foxy, gagtooth,
   gang tooth, gnawer, gold tooth, grinder, guide dog, gyp, herbivore,
   hound, incisor, insectivore, invertebrate, kennel, lap dog, lupine,
   mammal, mammalian, marsupial, marsupialian, milk tooth, molar,
   omnivore, pack of dogs, peg, permanent tooth, pivot tooth, pooch,
   premolar, primate, pup, puppy, quadruped, reptile, rodent,
   ruminant, scavenger, scrivello, sheep dog, show dog, sled dog,
   slut, snag, snaggletooth, tooth, toy dog, tush, tusk, tyke,
   ungulate, varmint, vermin, vertebrate, vulpine, watchdog, whelp,
   wisdom tooth, wolfish, working dog