'anteroflexion' originates from Latin, specifically the elements 'ante' and 'flexio' (from the verb 'flectere'), where 'ante' meant 'before, in front' and 'flectere' meant 'to bend'.

'anteroflexion' changed from Medieval Latin 'anteflexio' (or forms like 'anteflexionem') and was adopted into modern medical English as 'anteroflexion'.

Initially, it meant 'a bending forward' in Latin/Medieval Latin; over time the basic sense remained but narrowed to medical/anatomical usage referring to forward flexion of an organ.