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• RUBIDIUM-STRONTIUM DATING (noun) The noun RUBIDIUM-STRONTIUM DATING has 1 sense: 1. geological dating based on the proportions of radioactive rubidium into its decay product strontium; radioactive rubidium has a half-life of 47,000,000,000 years Familiarity information: RUBIDIUM-STRONTIUM DATING used as a noun is very rare.
