actinon

[ ak-tuh-non ]

noun

, Chemistry.

1. a chemically inert, gaseous, short-lived isotope of radon that is a member of the actinium series. : An; : 86; : 219.

actinon

/ ˈæktɪˌnɒn /

noun

1. a radioisotope of radon that is a decay product of radium. Symbol: An or ²¹⁹Rn; atomic no: 86; half-life: 3.92s
2. See actinide
   another name for actinide

Word History and Origins

Origin of actinon¹

From New Latin, dating back to 1925–30; actinium, -on ²

Word History and Origins

Origin of actinon¹

C20: New Latin, from actinium + -on