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The Collaborative International Dictionary
Anchylosing

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] ||

Wiktionary
anchylosing

vb. (present participle of anchylose English)