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• n  a radioactive isotope of an element; produced either naturally or artificially

• Boris Zhuykov, chief of the radioisotope laboratory at the Nuclear Research Institute of the Russian Academy of Sciences, says the discovery that polonium was the cause was "an act .
• By 2000, figured the committee, the earth's reactors will contain so much strontium 90 (a cancer-causing radioisotope which deposits in the bones) that the dispersal of 1% of it .
• The Pioneers, Viking, the Voyagers and even the manned Apollo spacecraft were equipped with plutonium-filled radioisotope thermoelectric generators, or RTGs, to supplement the .

News & Articles

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• Immunomedics: Epratuzumab study shows improvement of therapy after R-CHOP
  Immunomedics reported that adding two doses of epratuzumab labeled with the radioisotope, yttrium-90, 90Y, to a combination of rituximab and CHOP chemotherapy, R-CHOP, the standard of care for patients ...
  June 10, 2013 - Theflyonthewall.com via Yahoo! Finance

Quotes

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• Jerry McNerney in San Francisco Chronicle
  McNerney, who holds a doctorate in math, describes political fame as having the "half-life of a radioisotope" and offers a metaphysical disquisition on House floor proceedings, including observations that "there's levels of meaning" and...
• Tony Clement in Edmonton Journal
  Clement explained that "the moment we were alerted to this extended shutdown, Health Canada swung into action. We have been scouring the globe for other replacement radioisotope."