I. A small tree, shrub.
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.