The Collaborative International Dictionary of English v.0.48:

Disentanglement \Dis`en*tan"gle*ment\, n.
   The act of disentangling or clearing from difficulties.
   --Warton.
   [1913 Webster]

WordNet (r) 3.0 (2006):

disentanglement
    n 1: the act of releasing from a snarled or tangled condition
         [syn: unsnarling, untangling, disentanglement,
         extrication]