Definition of ruthenium in English:

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Pronunciation: /ro͞oˈTHēnēəm/


The chemical element of atomic number 44, a hard silvery-white metal of the transition series. (Symbol: Ru)
Example sentences
  • To this group belong the important steel alloying elements nickel and manganese, as well as cobalt and the inert metals ruthenium, rhodium, palladium, osmium, iridium and platinum.
  • It is also classified with a group of similar metals, including ruthenium, rhodium, palladium, osmium, and iridium, with similar properties.
  • That porous layer, which contains stabilized zirconia and small amounts of the metals ruthenium and cerium, chemically and cleanly converts the fuel to hydrogen.


Mid 19th century: modern Latin, from medieval Latin Ruthenia, so named because it was discovered in ores from the Urals.

Words that rhyme with ruthenium

helenium, proscenium, rhenium, selenium

For editors and proofreaders

Syllabification: ru·the·ni·um

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