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radiostrontium

[rey-dee-oh-stron-shee-uh m, -shuh m, -tee-uh m]
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noun Chemistry.
  1. strontium 90.
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Origin of radiostrontium

First recorded in 1940–45; radio- + strontium
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018