RUBIDIUM


Meaning of RUBIDIUM in English

[ rʊ'bɪdɪəm ]

■ noun the chemical element of atomic number 37, a rare soft silvery reactive metal of the alkali metal group. (Symbol: Rb )

Origin

C19: mod. L., from L. rubidus 'red' (with ref. to lines in its spectrum).

Concise Oxford English vocab.      Сжатый оксфордский словарь английского языка.