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CESIUM-137
- The most common radioactive form of the metal cesium; a radioactive byproduct of nuclear power plants commonly used in medical radiation treatment of cancer and in a variety of gauges in the construction and drilling industries.
- Usage: Report on the arrest in Thailand of a man allegedly offering over 60 pounds of radioactive material for sale.
Source: Merriam-Webster's Collegiate Dictionary, Tenth Edition.
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