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Showing words for RUBIDIUM using the English dictionary
8 Letter Words for Rubidium
6 Letter Words for Rubidium
5 Letter Words for Rubidium
4 Letter Words for Rubidium
3 Letter Words for Rubidium
Definitions for Rubidium
[1] a silver-white, metallic, active element resembling potassium, used in photoelectric cells and radio vacuum tubes. Symbol : Rb; atomic weight : 85.47; atomic number : 37; specific gravity : 1.53 at 20°C.
[2] a soft highly reactive radioactive element of the alkali metal group; the 16th most abundant element in the earth's crust (310 parts per million), occurring principally in pollucite, carnallite, and lepidolite. It is used in electronic valves, photocells, and special glass. Symbol: Rb; atomic no: 37; atomic wt: 85.4678; half-life of 87 Rb: 5 × 10 11 years; valency: 1, 2, 3, or 4; relative density: 1.532 (solid), 1.475 (liquid); melting pt: 39.48°C; boiling pt: 688°C
Words nearby Rubidium
rubeosis iridis diabetica, rubescent, rubiaceous, rubicon, rubicund, rubidium, rubidium-strontium dating, rubied, rubify, rubiginous, rubik cube
Origin of Rubidium
1860–65; < New Latin, equivalent to Latin rūbid(us ) red (in allusion to the two red lines in its spectrum) + -ium -ium
Other words from Rubidium
ru·bid·ic , adjective
Word origin for Rubidium
C19: from New Latin, from Latin rubidus dark red, with reference to the two red lines in its spectrum