Any of the hollow or grooved teeth of a venomous snake with which it injects its poison. Any of the canine teeth of a carnivorous animal, such as a dog or wolf, with which it seizes and tears its prey. A long, sharp, pointed tooth, especially a canine tooth. The root of a tooth or a pronglike division of such a root. A fanglike structure, especially a chelicera of a venomous spider.