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- pronunciation:
- reI
di
eI
sh
 n
- features:
- Word Explorer
| part of speech: |
noun |
| definition: |
the waves of energy sent out by sources of heat or light, or by radioactive material.
She wore a hat to protect her skin from the radiation of the sun.Many people are concerned about radiation from nuclear waste. |
| related words: |
glow |
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| derivation: |
radiational (adj.) |
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