rare Articulation (of bones), specifically by a joint which permits movement; an instance of this; a joint of this kind. Compare earlier "diarthrosis", "enarthrosis", "synarthrosis".
Disease of the joints; (in later use) specifically degenerative or other non-inflammatory disease; an instance of this. Compare earlier "arthrosia", and later "haemarthrosis", "hydrarthrosis", osteoarthrosis .
Mid 17th century; earliest use found in Nicholas Culpeper (1616–1654), physician and astrologer. From post-classical Latin arthrosis from Hellenistic Greek ἄρθρωσις compact connection, articulation (of speech) from ancient Greek ἀρθροῦν to utter distinctly, (passive) to be jointed (from ἄρθρον joint: see arthro-) + -ωσις.