Definition:
- (n.) 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.
Compare ruthenium with other words:
laurite vs. ruthenium
ruthenious vs. ruthenium
ruthenic vs. ruthenium