Invalid expression:%2Ad%5Bi%FCy%5D%5Beh%5D%25%5Bczk%5D%25%5Eith%25%5Buv%5Dh%25r%2A
Brockhaus-1911: Circulus
Eisler-1904: Circulus in probando
Kirchner-Michaelis-1907: circulus vitiosus
Mauthner-1923: circulus vitiosus
Meyers-1905: Circŭlus
Pierer-1857: Circŭlus