from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of several devices that amplify or generate electromagnetic waves, especially microwaves.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. 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
- n. Any celestial object that generates microwaves using the same method
- n. Obsolete spelling of mazer.
from the GNU version of the Collaborative International Dictionary of English
- n. Same as mazer.
- n. An electronic device producing coherent monochromatic microwave radiation; it produces less noise than other forms of microwave oscillator.
from The Century Dictionary and Cyclopedia
- n. An obsolete form of mazer.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an acronym for microwave amplification by stimulated emission of radiation; an amplifier that works on the same principle as a laser and emits coherent microwave radiation
It superseded the word maser, coined in 1950, meaning Microwave Amplification by Stimulated Emission of Radiation.
The result was a "maser" - like a laser, but using microwaves instead of visible light.
Ramsey and co-workers have also developed the hydrogen maser, which is at present our most stable source of electromagnetic radiation.
The optical maser, that is, the laser, dates from 1958, when the possibilities of applying the maser principle in the optical region were analysed by Schawlow and Townes as well as in the Lebedev Institute.
Several people at Columbia in the early 1950s, including physics Nobel laureate I.I. Rabi, told you that trying to build a maser was a waste of time.
"maser" -- Microwave Amplification by Stimulated Emission of Radiation -- in which microwaves were used as the atom-exciter.
Dr. Townes and his students coined the word "maser" for this device, which is an acronym for microwave amplification by stimulated emission of radiation.
 The "maser" is quoted as "given to the Wardens when they meet to drink on."
Bell's Cathedrals: Southwark Cathedral Formerly the Collegiate Church of St. Saviour, Otherwise St. Mary Overie. A Short History and Description of the Fabric, with Some Account of the College and the See
- 1953: American physicist Charles Townes builds forerunner of the laser, a "maser," for
Everything is numbered and documented so I can any "maser".