diarthrosis

noun

di·​ar·​thro·​sis ˌdī-är-ˈthrō-səs 

plural diarthroses ˌdī-är-ˈthrō-ˌsēz 

1

: articulation that permits free movement

2

: a freely movable joint

Word History

Etymology

borrowed from New Latin diarthrōsis, borrowed from Greek diárthrōsis, from diarthrō-, variant stem of diarthroûn "to separate by joints, articulate" (from di- di- + arthroûn "to fasten by a joint," derivative of árthron "joint, articulation") + -sis -sis — more at arthro-

First Known Use

1578, in the meaning defined at sense 1

Medical Definition

diarthrosis

noun

di·​ar·​thro·​sis ˌdī-är-ˈthrō-səs 

plural diarthroses -ˌsēz 

1

: articulation that permits free movement

2

: a freely movable joint

called also synovial joint