Read the dictionary definition of limb. All definitions for this word.
1. any projection that is thought to resemble a human arm
1. the arm of the record player
2. an arm of the sea
3. a branch of the sewer
2. the graduated arc that is attached to an instrument for measuring angles
1. the limb of the sextant
3. either of the two halves of a bow from handle to tip
1. the upper limb of the bow
4. one of the jointed appendages of an animal used for locomotion or grasping: arm; leg; wing; flipper
5. (astronomy) the circumferential edge of the apparent disc of the sun or the moon or a planet
6. any of the main branches arising from the trunk or a bough of a tree
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Merriam-Webster definition of limb