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 Anglais glossaire

radioactivity

[ˌreɪdiəʊæk'tɪvəti, -oʊæk'tɪvət̬i] abbr.
abrév. ra
milit. The property of a material emitting ionizing radiation
milit., logist. Emission of radiations produced by the nucleus of the atom disintegration. (FRA)