maser
noun
ma·ser ˈmā-zər 
: a device or object that emits coherent microwave radiation produced by the natural oscillations of atoms or molecules between energy levels
Example Sentences
Recent Examples on the Web It was made from a maser, which operates like a laser but releases microwave light. 
Nicole Yunger Halpern, Scientific American, 18 Apr. 2020 So Jefferts intentionally calibrates the maser at a frequency that's too high and one that's too low. Jay Bennett, Popular Mechanics, 24 Mar. 2017 The ball of cesium passes through the maser at the top of the chamber. Jay Bennett, Popular Mechanics, 24 Mar. 2017 The maser–the conceptual predecessor to the laser, which had been invented by Townes and others–had been around since the early 1950s, and the theoretical plans for the laser had also been around for a few years. Kat Eschner, Smithsonian, 7 July 2017 The maser–the conceptual predecessor to the laser, which had been invented by Townes and others–had been around since the early 1950s, and the theoretical plans for the laser had also been around for a few years. Kat Eschner, Smithsonian, 7 July 2017 The maser–the conceptual predecessor to the laser, which had been invented by Townes and others–had been around since the early 1950s, and the theoretical plans for the laser had also been around for a few years. Kat Eschner, Smithsonian, 7 July 2017 The maser–the conceptual predecessor to the laser, which had been invented by Townes and others–had been around since the early 1950s, and the theoretical plans for the laser had also been around for a few years. Kat Eschner, Smithsonian, 7 July 2017 The pumping scheme was originally designed for the laser’s predecessor, the maser, which amplified microwaves instead of light. Nicholas St. Fleur, New York Times, 11 Sep. 2017 See More
Nicole Yunger Halpern, Scientific American, 18 Apr. 2020 So Jefferts intentionally calibrates the maser at a frequency that's too high and one that's too low. Jay Bennett, Popular Mechanics, 24 Mar. 2017 The ball of cesium passes through the maser at the top of the chamber. Jay Bennett, Popular Mechanics, 24 Mar. 2017 The maser–the conceptual predecessor to the laser, which had been invented by Townes and others–had been around since the early 1950s, and the theoretical plans for the laser had also been around for a few years. Kat Eschner, Smithsonian, 7 July 2017 The maser–the conceptual predecessor to the laser, which had been invented by Townes and others–had been around since the early 1950s, and the theoretical plans for the laser had also been around for a few years. Kat Eschner, Smithsonian, 7 July 2017 The maser–the conceptual predecessor to the laser, which had been invented by Townes and others–had been around since the early 1950s, and the theoretical plans for the laser had also been around for a few years. Kat Eschner, Smithsonian, 7 July 2017 The maser–the conceptual predecessor to the laser, which had been invented by Townes and others–had been around since the early 1950s, and the theoretical plans for the laser had also been around for a few years. Kat Eschner, Smithsonian, 7 July 2017 The pumping scheme was originally designed for the laser’s predecessor, the maser, which amplified microwaves instead of light. Nicholas St. Fleur, New York Times, 11 Sep. 2017 See More Word History
Etymology
microwave amplification by stimulated emission of radiation
First Known Use
1955, in the meaning defined above
Medical Definition
maser
noun
ma·ser ˈmā-zər
: a device that utilizes the natural oscillations of atoms or molecules between energy levels for generating electromagnetic radiation in the microwave region of the spectrum
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