radiation
radiationnoun
UK/ˌreɪdiˈeɪʃən/US/ˌreɪdiˈeɪʃən/
DANGEROUS ENERGY
C1a dangerous form of energy that comes from some substances
- High levels of radiation were found near the power station.
ENERGY
C1heat or energy that is sent out in rays
- Sun cream protects you from the sun's radiation.