severed

n psychosurgery in which amygdaloid fibers that mediate limbic system activity are severed (in cases of extreme uncontrollable violence)

An instrument intended to replace the knife in many operations, the parts operated on being severed by the crushing effect produced by the gradual tightening of a steel chain, so that hemorrhage rarely follows.

severed, as an island.

Incapable of being severed

specifically (Min.), capable of being severed by the knife with a smooth cut