1 definition by Tarn

Top Definition
A highly unstable radioactive element, the heaviest of the halogen series, that resembles iodine in solution. Its longest lived isotope has a mass number of 210 and has a half-life of 8.3 hours.
"Oooh, I made Asta-*BOOOOOOOOOOOOOM*"
by Tarn June 05, 2005
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