The term amputation refers to the disconnection of all or part of a limb from the body. Specifically amputation is defined as removal of the structure through a bone. This is in contrast to disarticulation, which is removal of the structure through a joint.
When due to trauma, traumatic amputation can be disastrous, severing vital structures. Whereas surgical amputation is a controlled procedure that allows reconstruction of the stump (for function or use with prostheses thereafter). Amputations can also be congenital.