Definition of caesium

The word caesium uses 7 letters: a, c, e, i, m, s, u

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Meanings of caesium

n. - A rare alkaline metal found in mineral water; -- so called from the two characteristic blue lines in its spectrum. It was the first element discovered by spectrum analysis, and is the most strongly basic and electro-positive substance known. Symbol Cs. Atomic weight 132.6.

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