「promethium」の発音の仕方
「promethium」の独自の発音を追加します
「promethium」の意味と定義
- Noun
a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
同義語:
a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium