Here are the possible solutions for optical maser clue
Answer
Clue
Relevancy
laser
Clue
Optical maser
Definition
a source of high-intensity optical, infrared, or ultraviolet radiation produced as a result of stimulated emission maintained within a solid, liquid, or gaseous medium
aas
Clue
Batteries in optical mice
Definition
AA, (Hawaiian) a volcanic rock consisting of angular blocks of lava with a very rough surface
aorb
Clue
Optical illusion question, "Which is longer, ___?"
Optical illusion query, “Which is longer, ___?”
'Which is longer, --?' (optical illusion question)