Lewis Short
(adjective) : vīsŭālis, e, visus
* Attained by sight (late Lat.): probatio,Cassiod. Var. 4, 51.—Hence, subst.: vīsŭālĭa, ĭum, n., the power of vision, Theod. Prisc. 4, 2.— Adv.: vīsŭālĭter, visibly (late Lat.), Cassiod. in Psa. 36, 29.
Charlton T. Lewis, Charles Short, A Latin Dictionary