The Collaborative International Dictionary of English v.0.48:

Luxation \Lux*a"tion\, n. [L. luxatio: cf. F. luxation.]
   The act of luxating, or the state of being luxated; a
   dislocation.
   [1913 Webster]

WordNet (r) 3.0 (2006):

luxation
    n 1: displacement or misalignment of a joint or organ