'diarthrotic' originates from New Latin/Modern Latin, specifically the word 'diarthrosis', where Greek elements 'dia-' meant 'through, across' and 'arthron' meant 'joint'.

'diarthrotic' developed via New Latin/Modern Latin 'diarthrosis' from the ancient Greek word 'diarthrosis' (διάρθρωσις) incorporating 'arthron' ('joint'), and later entered English as the adjective form 'diarthrotic'.

Initially it referred to the anatomical condition 'a joint that allows free movement'; this basic sense has been retained in current medical usage to describe such joints or features relating to them.