Leontievian

Adjective

 * 1) Of or relating to  (Russian: Алексе́й Никола́евич Лео́нтьев; 1903–1979), Soviet developmental psychologist and philosopher and the founder of activity theory.
 * 1) Of or relating to  (Russian: Алексе́й Никола́евич Лео́нтьев; 1903–1979), Soviet developmental psychologist and philosopher and the founder of activity theory.