radiation
🇺🇸
/ˌreɪdiˈeɪʃn/
🇬🇧
/ˌreɪdiˈeɪʃn/
harmful rays from radioactive materials
Too much radiation can cause serious health problems.
energy that travels in waves, like heat or light
The sun's radiation provides warmth and light to Earth.
medical treatment using radiation to kill cancer cells
Radiation therapy is often used to treat cancer.