radiation

Energy released by radioactive materials that can damage living things or be used in medical treatment.

• The workers were exposed to radiation.
• She received radiation treatment for cancer.
• Thick walls protect staff from harmful radiation.

Common phrases: radiation exposure, radiation treatment, radiation sickness, a radiation leak

Energy travelling through space or materials as waves or tiny particles.

• The sun gives off radiation.
• Dark surfaces absorb more heat radiation.
• Scientists measure the radiation emitted by distant stars.

Common phrases: solar radiation, heat radiation, electromagnetic radiation, emit radiation

The spreading of something outwards from a central point or surface.

• The radiation of joy filled the room.
• He sensed a radiation of love from the audience.
• The drawing shows the outward radiation of lines from a centre.

How to use it: radiation of something from something (She felt a radiation of warmth from the welcoming crowd.)

Similar words: emanation, outward spread

Common phrases: radiation of love, outward radiation, radiation of warmth