arthrosis
noun
ar·thro·sis är-ˈthrō-səs 
plural arthroses är-ˈthrō-ˌsēz
1
: an articulation between bones
2
: a degenerative disease of a joint
Word History
Etymology
borrowed from New Latin arthrōsis "articulation of bones," borrowed from Greek árthrōsis "articulation, compact connection," from arthrō-, variant stem of arthroûsthai "to be jointed" (verbal derivative of árthron "joint") + -sis -sis — more at arthro-
First Known Use
1654, in the meaning defined at sense 1
Medical Definition
arthrosis
noun
ar·thro·sis är-ˈthrō-səs
plural arthroses -ˌsēz
1
: an articulation or line of juncture between bones
2
: a degenerative disease of a joint