放射線(ほうしゃせん)

ほうしゃせん
noun
radiation
technical
1. radiation; radioactive rays
Energy emitted in the form of waves or particles, especially ionizing radiation such as alpha rays, beta rays, and gamma rays. A significant topic in Japan due to its nuclear history.
放射線(ほうしゃせん)を浴(あ)びないように注意(ちゅうい)する。
Take care not to be exposed to radiation.
レントゲンは放射線(ほうしゃせん)を使(つか)って体(からだ)の中(なか)を撮影(さつえい)する。
X-rays use radiation to photograph the inside of the body.
放射線(ほうしゃせん)の量(りょう)が基準値(きじゅんち)を超(こ)えていないか、定期的(ていきてき)に測定(そくてい)している。
We regularly measure whether radiation levels exceed the standard values.

Usage

放射線(ほうしゃせん) is a scientific term that is widely known in everyday Japanese, especially after the 2011 Fukushima nuclear disaster. It appears frequently in news, health, and science contexts.

Common collocations

  • 放射線(ほうしゃせん)を浴(あ)びる (to be exposed to radiation)
  • 放射線(ほうしゃせん)治療(ちりょう) (radiation therapy)
  • 放射線(ほうしゃせん)量(りょう) (radiation dose)
  • 放射線(ほうしゃせん)技師(ぎし) (radiological technologist)

Similar words

  • 放射線(ほうしゃせん): radiation (the rays/energy emitted)
  • 放射能(ほうしゃのう): radioactivity (the property of emitting radiation)
  • 放射性物質(ほうしゃせいぶっしつ): radioactive material (the substance itself)

Related Words

Related: 放射能(ほうしゃのう) (radioactivity)
Related: 光線(こうせん) (beam, ray of light)
Related: 赤外線(せきがいせん) (infrared)
Related: 電磁波(でんじは) (electromagnetic waves)
Compare: 被曝(ひばく) (radiation exposure)
general
Added 2026.3.4 20:09 · Revised 2026.9.2 13:01
14500/14998_houshasen