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thoron

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(t̸hôr′än′)

noun

a radioactive isotope of radon, resulting from the disintegration of thorium

Origin: ModL < thor(ium) + -on as in argon

See thoron in American Heritage Dictionary 4

noun

A radioactive isotope of radon, Rn 220, having a half-life of 54.5 seconds and produced by the disintegration of thorium.

Origin:

Origin: thor(ium)

Origin: + -on²

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