LIMB, n. lim. L. limbus, edge or border, extremity limes, limit. The sense of limb is from shooting or extending.

1. Edge or border. This is the proper signification of the word but in this sense it is limited chiefly to technical use, and applied to the sun, moon, or a star, to a leaf, to a quadrant, &c. We say, the sun or moon is eclipsed on its northern limb. But we never say, the limb of a board, of a tract of land or water, &c.
2. In anatomy, and in common use, an extremity of the human body a member a projecting part as the arm or leg that is, a shoot.
3. The branch of a tree applied only to a branch of some size, and not to a small twig.
4. In botany, the border or upper spreading part of a monopetalous corol.