Lewis & Short

2. circumactus, ūs, m. [circumago], a moving or turning round (post-Aug.): assiduus caeli, Sen. Q. N. 7, 2, 2; Censor. de Die Nat. 23: corporis, Plin. 8, 30, 44, § 105; 8, 50, 76, § 201: rotarum, id. 28, 9, 37, § 141.