from
The Collaborative International Dictionary of English v.0.48
anchylosis \an`chy*lo"sis\, ankylosis
\an`ky*lo"sis\([a^][ng]`k[i^]*l[=o]"s[i^]s), n. [NL., fr. Gr.
'agky`lwsis, fr. 'agkyloy^n to crook, stiffen, fr. 'agky`los
crooked: cf. F. ankylose.]
1. (Med.) The process of formation of a stiff joint; also,
the abnormal adhesion and rigidity of the bones of a joint
which has become stiff. --Dunglison.
[1913 Webster + AS]
2. (Anat.) The union of two or more separate bones to from a
single bone; the close union of bones or other structures
in various animals.
[1913 Webster]