- 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
- (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" "a branch of the sewer"
