'Ruthenium' definitions:
Definition of 'ruthenium'
(from WordNet)
noun
A rare polyvalent metallic element of the platinum group; it is found associated with platinum [syn: ruthenium, Ru, atomic number 44]
Definition of 'Ruthenium'
From: GCIDE
- Ruthenium \Ru*the"ni*um\, n. [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. [1913 Webster]
Definition of 'ruthenium'
From: Elements
- Symbol: Ru
- Atomic number: 44
- Atomic weight: 101.07
- Hard white metallic transition element. Found with platinum, used as a catalyst in some platinum alloys. Dissolves in fused alkalis, and is not attacked by acids. Reacts with halogens and oxygen at high temperatures. Isolated in 1844 by K.K. Klaus.