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Rb

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WordReference Random House Unabridged Dictionary of American English © 2026

Rb, [Symbol, Chem.]

Chemistryrubidium.

Collins Concise English Dictionary © HarperCollins Publishers::

Rb the chemical symbol for

rubidium

'Rb' also found in these entries (note: many are not synonyms or translations):

rubidium - rubidium-strontium dating

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