limb
noun
one of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper
any of the main branches arising from the trunk or a bough of a tree
Synonymstree branch(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”
the graduated arc that is attached to an instrument for measuring angles
“the limb of the sextant”
any projection that is thought to resemble a human arm
“the arm of the record player”
“an arm of the sea”
Source: WordNet 3.1, Princeton University
