The Collaborative International Dictionary of English v.0.48:

Anchylose \An"chy*lose\, v. t. & i. [imp. & p. p. Anchylosed;
   p. pr. & vb. n. Anchylosing.] [Cf. F. ankyloser.]
   To affect or be affected with anchylosis; to unite or
   consolidate so as to make a stiff joint; to grow together
   into one. [Spelt also ankylose.] --Owen.
   [1913 Webster] ankylosis