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Definition of "iodine-131" []

  • (medicine) The radioactive isotope of iodine, 13153I, having a half-life of 8 days; used as a medical tracer (noun)

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Use "iodine-131" in a sentence
  • "U.S. states, which aren't recommending protective measures for the public, are reporting tiny amounts of radioactive iodine known as iodine-131 that is seen in the early stages of a nuclear reaction."
  • "The ministry also said that an abnormal amount of the material, called iodine-131, was detected in milk from a dairy farm about 50 kilometers away from the plant."
  • "A water sample taken just outside the water intake for the No. 2 unit showed the level of radioactive iodine-131 at 7.5 million times the allowable limit, the most dangerous level of radiation so far detected."