Rho"di*um (?), n. [NL., fr. Gr. "ro`don the rose. So called from the rose-red color of certain of its solutions. See Rhododendron.] Chem.
A rare element of the light platinum group. It is found in platinum ores, and obtained free as a white inert metal which it is very difficult to fuse. Symbol Rh. Atomic weight 104.1. Specific gravity 12.
© Webster 1913.