A fang is a long, sharp tooth that is used to do harm. Vampires have them, venomous snakes have them... you could have them, too, if your Halloween costume includes a set of pointy teeth.

The word fang came into English from the Old Norse word fang, meaning “capture, grasp.” It was originally used to describe something that was seized or captured, like loot taken after a battle. Later it meant "something that traps or snares." When you think of a sharp tooth’s ability to snare something, it’s not such a leap to the word’s current meaning: the long, pointy teeth of a predatory animal or a snake — or a vampire.

Definitions of fang

n canine tooth of a carnivorous animal; used to seize and tear its prey

Type of:
canine, canine tooth, cuspid, dogtooth, eye tooth, eyetooth
one of the four pointed conical teeth (two in each jaw) located between the incisors and the premolars

n hollow or grooved tooth of a venomous snake; used to inject its poison

Type of:
hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense

n an appendage of insects that is capable of injecting venom; usually evolved from the legs

either of a pair of poison fangs in the modified front pair of legs of the centipede
Type of:
appendage, extremity, member
an external body part that projects from the body

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