Talon

noun

1. A sharp, hooked claw of a bird of prey or other predatory animal.
2. One of certain small prominences on the hind part of the face of an elephant's tooth.
3. A kind of moulding, concave at the bottom and convex at the top; an ogee. (When the concave part is at the top, it is called an inverted talon.)
4. The shoulder of the bolt of a lock on which the key acts to shoot the bolt.
5. In various card games, the remaining stock of undealt cards.