noun🔗ShareCurie (Ci)3.7×1010 decays per second, as a unit of radioactivity. Symbol Ci."The scientist measured the radioactivity of the soil sample and found it contained half a curie (0.5 Ci) of radium-226. "Le scientifique a mesuré la radioactivité de l'échantillon de sol et a constaté qu'il contenait un demi-curie (0,5 Ci) de radium-226.physicschemistryenergyunitscienceChat with AIVocabulary GamePractice Reading