dysaesthesiaPronunciation: /dɪsɪsˈθiːzɪə/ (US dysesthesia)Definition of dysaesthesia noun (plural dysaesthesiae /-zɪiː/ or dysaesthesias) Medicine an abnormal unpleasant sensation felt when touched, caused by damage to peripheral nerves. Origin: early 18th century: modern Latin, from Greek dusaisthēsia, from dys- 'bad' + aisthēsis 'sensation' + -ia1