brachium

Example:The mantis uses its long limb to catch insects.

Definition:A part of an animal's body, especially an arm or leg, that can move independently and that serves for grasping, supporting, or locomotion.

Example:The spider has eight appendages, each serving a role in its body.

Definition:A part of an animal or plant that has grown out from the main body or stem and serves a specific function, such as a limb or a branch.