n. 钌

[化] 钌Ru

[医] 钌(44号元素)

[ noun ]
a rare polyvalent metallic element of the platinum group; it is found associated with platinum
<noun.substance>

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}.