rubidium.
(Of thelat. )( rubidus, blond, because in the spectroscopic analysis presents two red stripes).
1. m. chemical element of no. atóm. 37. Rare metal in the Earth's crust, is as trace in some mineral waters, plants and minerals of potassium. Silver white, soft and heavy, it is very reactive and oxidizes quickly. It is used in the manufacture of solar cells. (Símb.) Rb).
