rhodium (ro'de-um). i

A white, lustrous metal, le fusible than platinum even, and scarcely attacked by acids, or aqua regia. Atomic weight, 103. Symbol, Rh. 2. See lignum rhodii. lignum rhodii, lignum r. 1. The root wood of Convolvulus scoparius, probably also of Convolvulus florid us. It has the odor of rosewood, and yields oil of rhodium. 2. American rosewood (wood of Amyris balsam if era). oil of r. A fragrant oil distilled from the wood of Convolvulus scoparius, Convolvulus florid us, and Genista canariensis; used to adulterate oil of rose. [Gr., roored.] don, a rose, its chlorid being rose-col rhodopsin (ro-dop's in). See visual purple. [Gr., rod on, rose, -f* ops is, vision.]