(n)a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum, Syn.Rh, atomic number 45
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
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. [1913 Webster]
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