Lewis & Short

altĭuscŭlē, adv., v. altiusculus.

altĭuscŭlus, a, um, adj. dim. [altus], rather high, a little too high (only in the foll. exs.): usus est calceamentis altiusculis, * Suet. Aug. 73.
Adv.: altĭuscŭlē, somewhat highly, App. M. 8 fin.; 2, p. 117, 34 Elm.