Dictionary

maser

noun ma·ser \ˈmā-zər\

Definition of MASER

:  a device or object that emits coherent microwave radiation produced by the natural oscillations of atoms or molecules between energy levels

Origin of MASER

microwave amplification by stimulated emission of radiation
First Known Use: 1955

maser

noun ma·ser \ˈmā-zər\   (Medical Dictionary)

Medical Definition of MASER

:  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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