放ほう射しゃ能のう雲ぐもMeanings1nounradioactive cloudRefers to a cloud containing radioactive material, often from a nuclear explosion or accident.核かく実じっ験けんの後あと、放ほう射しゃ能のう雲ぐもが広ひろがった。After the nuclear test, a radioactive cloud spread.
