降こう下か物ぶつ

noun

fallout; deposited matter

Technical term for particulate matter that settles from the atmosphere, especially radioactive fallout. Used in environmental and nuclear contexts.

• 原げん発ぱつ事じ故こ後ご、降こう下か物ぶつの調ちょう査さが行おこなわれた。

  After the nuclear accident, surveys of fallout were conducted.

• 降こう下か物ぶつには放ほう射しゃ性せい物ぶっ質しつが含ふくまれている可か能のう性せいがある。

  Fallout may contain radioactive materials.