ra‧di‧a‧tion /ˌreɪdiˈeɪʃən/ noun [uncountable]

1. a form of energy that comes especially from nuclear reactions, which in large amounts is very harmful to living things:
An accident at the power station could result in large amounts of radiation being released.
a lethal dose of radiation

2. energy in the form of heat or light that is sent out as waves that you cannot see:
Sun creams work by blocking harmful ultraviolet radiation.

[TahlilGaran] Dictionary of Contemporary English ▲

radiation
noun
ADJ. background | low-level | harmful | electromagnetic, gravitational, infrared, microwave, nuclear, solar, thermal, ultraviolet
QUANT. dose Patients receive high doses of radiation during cancer treatment.
VERB + RADIATION emit, give off | absorb The ozone layer absorbs solar radiation.
measure, monitor | expose sb to Nuclear testing has exposed millions of people to radiation.
RADIATION + NOUN sickness | leak | dose, level | exposure | therapy
PREP. ~ from radiation from computer screens

[TahlilGaran] Collocations Dictionary ▲

radiation

nuclear radiation
Nuclear radiation has a devastating effect on living cells.
solar radiation (=from the sun)
How can solar radiation be trapped and used?
cosmic radiation (=from space)
The spacecraft is fitted with a shield to block cosmic radiation.
ultraviolet/infra-red radiation (=from the light produced by the sun)
Ultraviolet radiation damages DNA in plants.
gamma/alpha/beta radiation technical (=radiation given off by the atomic matter of gamma, alpha, or beta rays)
The conventional treatment for cancer is to bombard the tumour with gamma radiation.
background radiation (=the radiation normally present in the environment)
In some parts of the world, background radiation is very high.
a radiation leak
A radiation leak occurred at a Russian nuclear power station.
radiation levels
The background radiation level was normal.
give off radiation (also emit radiation formal) (=produce it)
The lamps emit ultra-violet radiation.
absorb radiation
It is thought that a black hole absorbs any solar radiation that reaches it.
be exposed to radiation (=be put in a situation where you are not protected from harmful radiation, especially nuclear radiation )
The servicemen claimed they were illegally exposed to radiation during atomic tests.
a dose of radiation (=an amount of radiation that someone experiences)
Workers at the site received high doses of radiation.
exposure to radiation (=when someone is near to a substance that gives off harmful radiation, especially nuclear radiation)
One cause of leukaemia is exposure to radiation.

[TahlilGaran] Collocations Dictionary ▲