(astronomy) The generation of microwaves by the maser method.

(physics) 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

Obsolete spelling of mazer

plural of maser

plural of MASER

Acronym of microwave amplification by the stimulated emission of radiation.

an atomic clock which uses the 1.4 GHz transition in a hydrogen atom to measure time to within 0.45 nanoseconds over a span of 12 hours

plural of hydrogen maser atomic clock