arbuscula
From LSJ
Latin > English (Lewis & Short)
arbuscŭla: ae, f.
dim. from arbor, as maiusculus, minusculus, from maior, minor.
I A small tree, shrub.
A Lit., Varr. R. R. 3, 15; Col. 5, 10, 7; 5, 11, 13; 11, 2, 79.—
B Transf., of a tuft of feathers: arbuscula crinita, i. e. the crown on the head of the peacock, Plin. 11, 37, 44, § 121.—
II In mechanics, a movable machine for propelling military engines, Gr. ἁμαξόποδες>, Vitr. 10, 20.