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Webster 1913 Edition
Ruthenium
Ru-the′ni-um
,Noun.
[NL. So named from the
Ruthenians
, a Little Russian people, as coming from Russia, the metal having been found in the Ural mountains.] (Chem.)
A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See
Platinum metals
, under Platinum
.