rubidiumn. 銣銣Rb學術名詞銣：化學元素、地球科學、電機工程、礦冶工程、金屬材料、核能銣Rb：電力工程銣（Rb）：鑄造學英文釋義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