D defs.my
Entry 2 senses Webster, 1913

maser

/māz'-ẽr/ · ma·ser · IPA /ˈmeɪzɚ/
01 n. Same as Mazer.
  1. 1.
    Same as Mazer. See: Mazer
  2. 2.
    An electronic device producing coherent monochromatic microwave radiation; it produces less noise than other forms of microwave oscillator.(Physics) [acronym]