radiation

Meanings

1. 1
   noun

   Energy that travels as rays, waves, or particles, such as heat or light.

   Too much radiation from the sun can damage your skin.

2. 2
   noun

   Dangerous energy released by radioactive substances.

   People were warned to stay away because of the radiation from the plant.

3. 3
   noun

   Medical treatment that uses rays to destroy harmful cells, especially in cancer.

   After surgery, she had several weeks of radiation.

Borrowed from Latin radiatio, radiationis. By surface analysis, radiate + -ion.

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