ハフニウムハフニウムMeanings1nounhafnium (Hf)chemistryChemical element with atomic number 72. Used in nuclear reactors and alloys.ハフニウムは原げん子し炉ろの制せい御ぎょ棒ぼうに使つかわれる。Hafnium is used in control rods of nuclear reactors.
