Laser's kin (5)
I believe the answer is:
maser
(Other definitions for maser that I've seen before include "Microwave beam generator" , "Microwave beam producer" .)
I've seen this clue in the Penny Press.
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.