[ad. L. arbuscula, dim. of arbor, arbos tree; also, a tuft of feathers.]
a. A dwarf tree; a shrub of tree-like growth. b. A tuft of feathery cilia.
1657. in Phys. Dict.
1831. Macgillivray, trans. Richards Bot., 49. Arbuscles, when they are branched at their base and carry buds, e. g. the Hasel and Lilac.
1860. Encycl. Brit., XXI. 996/1. Medusidæ their rims ornamented with fringes, furbelows, and arbuscles of such delicacy.