Extremity
An extremity is a point or region at the farthest edge or end of a place or object. It marks a limit or terminal position.
Boundary: A line or surface marking the limit of an area or object. An extremity lies at or near the boundary of the place or object.
Limb (anatomy): An arm or leg, or an analogous appendage, attached to an organism's body. In anatomy, extremities commonly mean the limbs.
Interior (topology): The set of points inside a space, excluding its boundary. An extremity belongs to the outer region, unlike the interior.
Extreme: A condition, value, or position far beyond the usual range. The adjective shares the idea of being at the farthest limit.
Endpoint: The terminal point of a line, path, interval, or process. An extremity can be the terminal point of an object's length or route.
Upper limb: The anatomical limb extending from the shoulder to the hand. It is one of the body's two major extremity groups.
Periphery: The outer boundary or area surrounding the center of a place or object. A periphery is an outer region; an extremity is a particular farthest point or end.
Extremism: Advocacy of views or actions far outside a society's accepted political or social norms. The shared root carries the sense of positions at a far limit.
Edge: The line along which a surface or shape ends. An extremity is often located at an edge.
Lower limb: The anatomical limb extending from the hip to the foot. It is the other major extremity group in anatomical usage.