Meaning of maser in English:


Pronunciation /ˈmeɪzə/


  • A device using the stimulated emission of radiation by excited atoms to amplify or generate coherent monochromatic electromagnetic radiation in the microwave range.

    Compare with laser

    ‘There are of course lasers with wavelengths in the infrared, masers that emit coherent microwaves, and even x-ray lasers.’
    • ‘Instead of emitting light, like a laser, the maser emits microwave energy at a specific frequency, which produces a very specific ticking.’
    • ‘Instead of emitting visible light, a maser generates a beam of pure microwave energy - electromagnetic waves intermediate in length between infrared and radar.’
    • ‘Natural astronomical masers - the analog of laser emission at microwave wavelengths - are one class of coherent sources, but these emit in specific wavelengths.’
    • ‘The complex maser rays and laser concentrate the incredible power of light into rays of various useful strengths: from rays so sensitive you can perform microscopic surgery with them, to brute rays that can pierce through a wall of steel.’


1950s acronym from microwave amplification by the stimulated emission of radiation.