laser
Pronunciation
Noun
B2 Upper-intermediate
Quick answer
A device that produces a narrow, highly concentrated beam of light of a single color.
Test yourself
Which word fits the gap? "Surgeons now use a _____ for certain eye procedures that once required a scalpel."
Answer: laser
In your own words, what does "laser" mean?
A device that produces a narrow, highly concentrated beam of light of a single color.
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