Tusk (noun)

1. A large, elongated, pointed tooth, especially one that projects from the jaw in an animal such as an elephant, walrus, or wild boar.
2. A large, protruding tooth, especially one that is elongated and pointed and projects from the jaw.

Origin:

From old english tux, tusc, from proto-germanic *tuskaz ("tooth"), from proto-indo-european *dus- ("tooth").

Examples:

1. The elephant used its tusk to defend itself.
2. The walrus used its tusk to break through the ice.
3. The tusk was carved into a ceremonial object.
4. The tusk was used as a weapon by the wild boar.
5. The tusk was valuable as a material for making jewelry.