レニウムレニウムMeanings1nounrhenium (Re)Chemical element with atomic number 75. Used in high-temperature alloys and catalysts.レニウムは耐たい熱ねつ合ごう金きんに使つかわれる金きん属ぞく元げん素そです。Rhenium is a metallic element used in heat-resistant alloys.