Curie 22 : The basic unit used to describe the intensity of radioactivity in a sample of material; it is equal to 37 billion disintegrations per second, or approximately the rate of decay of one gram of radium
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}