maser

noun

ma·​ser ˈmā-zər How to pronounce maser (audio)
: 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 In addition to fusion, his list includes laser- or maser-driven sails, electromagnetic rockets and an antimatter drive. Corey S. Powell, Discover Magazine, 27 May 2015 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 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'maser.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

microwave amplification by stimulated emission of radiation

First Known Use

1955, in the meaning defined above

Time Traveler
The first known use of maser was in 1955

Dictionary Entries Near maser

Cite this Entry

“Maser.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/maser. Accessed 7 Feb. 2023.

Kids Definition

maser

noun
ma·​ser ˈmā-zər How to pronounce maser (audio)
: a device that uses the natural vibrations of atoms or molecules for generating electromagnetic radiation at a single microwave frequency

Medical Definition

maser

noun
ma·​ser ˈmā-zər How to pronounce maser (audio)
: 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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