二に重じゅう水すい素そにじゅうすいそじ字FuriganaAudioMeanings1noundeuterium; heavy hydrogenchemistry›Technical term in chemistry for the stable isotope of hydrogen with one proton and one neutron. Often contrasted with 三重水素 (tritium).See also: 重水素二に重じゅう水すい素そは核かく融ゆう合ごう反はん応のうに使つかわれる。Break this sentence down in the analyzerDeuterium is used in nuclear fusion reactions.水みずの中なかにはごくわずかな二に重じゅう水すい素そが含ふくまれている。Break this sentence down in the analyzerA very small amount of deuterium is contained in water.
