A partially dislocated joint is called?

A partially dislocated joint is referred to as subluxation. This term specifically describes a situation in which the joint surfaces are improperly aligned but not completely separated. In a subluxation, the bones within the joint move out of their normal position but still maintain some contact with each other. This can lead to joint instability, pain, and potentially increased susceptibility to future dislocations.

The other terms provided describe different conditions: malrotation pertains to the improper rotation of a limb or body part; avulsion refers to an injury where a body structure is forcibly detached, often seen in the case of tendons or ligaments; and malunion relates to a bone that heals improperly after a fracture, resulting in a misalignment. None of these definitions capture the concept of a joint that has lost its normal alignment to some degree, which is characteristic of subluxation.