Optical device producing an intense monochromatic beam of light (5)

I believe the answer is:

laser

(Other definitions for laser that I've seen before include "Optical device producing an intense beam of light" , "Intense light generator" , "Source of intense beam" , "Device that produces an intense beam of light" , "scientific instrument" .)

I've seen this clue in The Guardian.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.