Limb (noun)

1. A projecting part of a tree that is not the trunk or a branch and that usually bears leaves.
2. A projecting part of an animal's body such as a leg, arm, or wing.
3. One of the main branches of a tree or other plant.
4. Something similar in shape or position to a limb of a tree or animal.
5. A part of an apparatus or system.

Origin:

Middle english, from old english lim; akin to old high german lîm limb and probably to lithuanian gleivas.

Examples:

1. The bird perched on a limb of the tree.
2. He broke his limb in the accident.
3. The limb of the bridge was damaged by the ship.
4. The solar panels are attached to the limbs of the spacecraft.
5. His arguments have a lot of flaws, they are like limbs of a weak tree.