pseudarthrosis

noun

pseud·​ar·​thro·​sis ˌsüd-är-ˈthrō-səs 

variants also pseudoarthrosis

ˌsüd-ō- 

plural pseudarthroses -ˈthrō-ˌsēz 

: an abnormal union formed by fibrous tissue between parts of a bone that has fractured usually spontaneously due to congenital weakness

called also false joint