radiation

US /ˌrediˈeʃən/

・

UK /ˌreɪdiˈeɪʃn/

B1
DefinitionVideo subtitles

noun

  • Energy transmitted as rays, waves or particles
  • Harmful waves of energy from nuclear activity

other

  • The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.
  • The emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization.
  • The transfer of energy as electromagnetic waves, without the need for a medium.
  • The use of high-energy radiation to treat disease, especially cancer.
  • The process of emitting energy as waves or particles.