maser

  1. a device for the coherent amplification or generation of electromagnetic radiation (especially of microwave frequency) by the use of excitation energy in resonant atomic or molecular systems
  2. Any celestial object that generates microwaves using the same method

Pronounced as (IPA)
/ˈmeɪzɚ/
Etymology

From MASER, acronym of microwave amplification by stimulated emission of radiation.

quantum amplifier

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