ruthenium
/ruːˈθiːnɪəm/noun
mass noun
- the chemical element of atomic number 44, a hard silvery-white metal of the transition series. (Symbol: Ru)（化学元素）钌（符号： Ru）。
词源
mid 19th cent.: modern Latin, from medieval Latin Ruthenia （see R UTHENIA）, so named because it was discovered in ores from the Urals.