curiecommon nouncommon nounproper nounSyllable DecompositioncurieEtymologyexpandfrom Latin curia « curia, building dedicated to a curia, meeting place ».Definition1. Former unit of measurement of radioactivity, equivalent to the activity of one gram of natural radium in equilibrium with its decay products, and whose symbol is Ci.métrologieexpandLe curie vaut 37 gigabecquerels.