n. Chem. a soft silvery element occurring naturally in various minerals and as the radioactive isotope rubidium-87. °Symb.: Rb.
[ L rubidus red (with ref. to its spectral lines) ]
n. Chem. a soft silvery element occurring naturally in various minerals and as the radioactive isotope rubidium-87. °Symb.: Rb.
[ L rubidus red (with ref. to its spectral lines) ]
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012