n. [ From the name of the discoverer, A. Cassius, a German physician of the 17th centry. ] A brownish purple pigment, obtained by the action of some compounds of tin upon certain salts of gold. It is used in painting and staining porcelain and glass to give a beautiful purple color. Commonly called Purple of Cassius. [ 1913 Webster ]

n. a type of tropical American thorny shrub or small tree (Acacia farnesiana); it bears fragrant yellow flowers used in making perfumery.
Syn. -- huisache, mimosa bush, sweet wattle, sweet acacia, scented wattle, flame tree, Acacia farnesiana. [ WordNet 1.5 ]