canine (adj.)
c. 1600, of teeth, from canine (n.) or Latin caninus. Meaning "pertaining to a dog or dogs" is from 1620s.
canine (n.)
"pointed tooth," late 14c., from Latin caninus "of the dog," genitive of canis "dog" (source of Italian cane, French chien), from PIE root *kwon- "dog." The noun meaning "dog" is first recorded 1869.