\Tal"on\, n. [F., heel, spur, LL. talo, fr. L. talus the
ankle, heel.]
1. The claw of a predaceous bird or animal, especially the
   claw of a bird of prey. --Bacon.
2. (Zo["o]l.) One of certain small prominences on the hind
   part of the face of an elephant's tooth.
3. (Arch.) A kind of molding, concave at the bottom and
   convex at the top; -- usually called an {ogee}.
Note: 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. --Knight.