ミリキュリーMeanings1nounmillicurieA unit of radioactivity equal to one thousandth of a curie. Used in scientific and medical contexts.この放ほう射しゃ性せい同どう位い元げん素その放ほう射しゃ能のうは約やく5ミリキュリーです。The radioactivity of this radioisotope is about 5 millicuries.