プルトニウム爆ばく弾だんじ字FuriganaMeanings1nounplutonium bombA nuclear weapon that uses plutonium as its fissile material. Technical and historical term.長なが崎さきに投とう下かされたのはプルトニウム爆ばく弾だんだった。What was dropped on Nagasaki was a plutonium bomb.
