arbuscŭla (noun F) : dim.from arbor, as majusculus, minusculus, from major, minor.
* A small tree, shrub.
* Lit., Varr. R. R. 3, 15; Col. 5, 10, 7; 5, 11, 13; 11, 2, 79.
* In mechanics, a movable machine for propelling military engines, Gr. ἁμαξόποδες, Vitr. 10, 20.

s. TLL