thoron

[ thawr-on, thohr- ]

noun

, Chemistry.

1. a radioactive isotope of radon, produced by the disintegration of thorium. : Tn; : 220; : 86.

thoron

/ ˈθɔːrɒn /

noun

1. a radioisotope of radon that is a decay product of thorium. Symbol: Tn or ²²⁰Rn; atomic no: 86; half-life: 54.5s

Word History and Origins

Origin of thoron¹

First recorded in 1925–30; thor(ium) + -on ²

Word History and Origins

Origin of thoron¹

C20: from thorium + -on

Example Sentences

But the crusaders embarrassed themselves with the siege of the castle of Thoron.

From Project Gutenberg