Lewis & Short

actŭōsus, a, um, adj. [actus], full of activity, very active (with the access. idea of zeal, subjective impulse; diff. from industrius, which refers more to the means by which an object is attained, Doed. Syn. 1, 123): virtus actuosa (est), et deus vester nihil agens expers virtutis (est), Cic. N. D. 1, 40; so id. Or. 36, 125; Sen. Ep. 39.
Hence, acc. to Fest. s. v. actus, p. 15, subst., an actor or dancer.
Adv.: actŭōse, in a lively manner, with activity, Cic. de Or. 3, 26, 102.