\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.