Definition of ankylosis noun from the Oxford Advanced Learner's Dictionary

 

ankylosis

 noun
noun
BrE BrE//ˌæŋkɪˈləʊsɪs//
 
; NAmE NAmE//ˌæŋkɪˈloʊsɪs//
 
[uncountable](medical)
 
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a disease that causes one or more of the joints of the body to join together and become stiff Word Origin early 18th cent.: from Greek ankulōsis, from ankuloun ‘to crook’, from ankulos ‘crooked’.
See the Oxford Advanced American Dictionary entry: ankylosis