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放射性降下物 (ほうしゃせいこうかぶつ) Japanese meaning | Kotomora

放ほう射しゃ性せい降こう下か物ぶつ

ほ

う

しゃ

せ

い

こ

う

か

ぶ

つ

Meanings

1

noun

radioactive fallout

Technical term used in nuclear physics, environmental science, and disaster contexts. Refers to radioactive particles that fall to the ground after a nuclear explosion or accident.

放ほう射しゃ性せい降こう下か物ぶつの拡かく散さんを予よ測そくするシミュレーションが行おこなわれた。
A simulation was conducted to predict the spread of radioactive fallout.
原げん発ぱつ

事じ

故こ

後ご

、

広こう

範はん

囲い

で

放ほう

射しゃ

性せい

降こう

下か

物ぶつ

が

検けん

出しゅつ

さ

れ

た

。

After the nuclear accident, radioactive fallout was detected over a wide area.

Kanji

放set free, release, fire
射shoot, shine into, onto
性sex, gender, nature
降descend, precipitate, fall
下below, down, descend
物thing, object, matter

Similar words

放ほう射しゃ性せい物ぶっ質しつ
放射性物質 is a broader term for any radioactive material, while 放射性降下物 specifically refers to airborne radioactive particles that settle on the ground.
死しの灰はい
死の灰 (literally 'death ash') is a more dramatic, colloquial term for radioactive fallout, often used in historical or emotional contexts.

Etymology

Compound of 放射性 (radioactivity) + 降下 (falling, descent) + 物 (thing, substance). A direct calque of English 'radioactive fallout'.