The Collaborative International Dictionary of English v.0.48:

Alligate \Al*li*gate\, v. t. [L. alligatus, p. p. of alligare.
   See Ally.]
   To tie; to unite by some tie.
   [1913 Webster]

         Instincts alligated to their nature.     --Sir M. Hale.
   [1913 Webster]