Definitions:
an arm or leg of a person or four-legged animal, or a bird's wing

a large branch of a tree

a projecting landform such as a spur of a mountain range, or each of two or more such projections as in a forked peninsula or archipelago.

the edge of the disc of a celestial object, especially the sun or moon

the blade or broad part of a leaf or petal.

the graduated arc of a quadrant or other scientific instrument, used for measuring angles.