ruthenium

 
Pronunciation: /rʊˈθiːnɪəm/

noun

[mass noun]
  • the chemical element of atomic number 44, a hard silvery-white metal of the transition series. (Symbol: Ru)

Origin:

mid 19th century: modern Latin, from medieval Latin Ruthenia (see Ruthenia), so named because it was discovered in ores from the Urals