[ 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).
[ 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. 2004