Meaning & use
radiation
Energy that travels outward from a source as waves or particles, including light, heat, and nuclear emissions.
See it in a sentence
The sun's radiation warms the earth and drives most of its weather.
Doctors used targeted radiation to shrink the tumor before surgery.
A note on using this word
Radiation can be harmless, like visible light, or dangerous, like the ionizing radiation released by nuclear material; context determines which.
Words with a similar meaning
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