limb

Any projection that is thought to resemble a human arm.

Any of the main branches arising from the trunk or a bough of a tree.

(astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet.

Either of the two halves of a bow from handle to tip.

“the upper limb of the bow”

One of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper.

The graduated arc that is attached to an instrument for measuring angles.

“the limb of the sextant”