radiation
Pronunciation
Noun
B1 Intermediate
Quick answer
Energy that travels as waves or particles, such as heat, light, or the harmful kind released by radioactive materials.
Test yourself
Which word fits the gap? "Doctors use controlled _____ to treat certain types of cancer."
Answer: radiation
In your own words, what does "radiation" mean?
Energy that travels as waves or particles, such as heat, light, or the harmful kind released by radioactive materials.
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