What does "canine" mean?

Canine: (Anat.) Of or pertaining to the pointed tooth on each side the incisors. Canine appetite, a morbidly voracious appetite; bulimia. -- Canine letter, the letter r. See R. -- Canine madness, hydrophobia. -- Canine toth, a toth situated between the incisor and bicuspid teeth, so called because well developen 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.