ac·ti·non 
(ăktə-nŏn′)
(ăktə-nŏn′)n.
A radioactive isotope of radon, Rn-219, having a half-life of 3.96 seconds and produced by the disintegration of actinium.
[ACTIN(IUM) + -ON2.]
- organization
- organizational
- organizationally
- organize
- organized
- organized crime
- organizer
- organo-
- organochlorine
- organ of Corti
- organogenesis
- organogenetic
- organogenetically
- organographic
- organographically
- organography
- organoleptic
- organoleptically
- organologic
- organological
- organology
- organomercurial
- organometallic
- organon
- organophosphate