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Definition of Rubidium
1. Noun. A soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite.
Generic synonyms: Metal, Metallic Element
Substance meronyms: Carnallite, Lepidolite, Pollucite
Definition of Rubidium
1. n. A rare metallic element. It occurs quite widely, but in small quantities, and always combined. It is isolated as a soft yellowish white metal, analogous to potassium in most of its properties. Symbol Rb. Atomic weight, 85.2.
Definition of Rubidium
1. Noun. A metallic chemical element (''symbol'' Rb) with an atomic number of 37. ¹
¹ Source: wiktionary.com
Definition of Rubidium
1. a metallic element [n -S] : RUBIDIC [adj]
Medical Definition of Rubidium
1.