ankylosis
noun
an·ky·lo·sis ˌaŋ-ki-ˈlō-səs 
plural ankyloses ˌaŋ-ki-ˈlō-ˌsēz
1
: stiffness or fixation of a joint by disease or surgery
2
: union of separate bones or hard parts to form a single bone or part
ankylotic
ˌaŋ-ki-ˈlä-tik
adjective 
Word History
Etymology
earlier ancylosis, anchylosis, borrowed from New Latin ancylosis, borrowed from Greek ankýlōsis "tongue-tie, stiffening of joints," from ankylō-, variant stem of ankyloûn "to crook, bend" (derivative of ankýlos "bent, crooked, curved") + -sis -sis, angle entry 3
First Known Use
1713, in the meaning defined at sense 1
Medical Definition
ankylosis
noun
an·ky·lo·sis
variants also anchylosis
ˌaŋ-ki-ˈlō-səs
plural ankyloses -ˌsēz
: stiffness or fixation of a joint by disease or surgery