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maser

(mā′zər)

☆

noun

a device, operating at microwave frequencies, in which atoms or molecules are raised to a higher energy level and allowed to lose the energy by radiation that is emitted at a very precise frequency

Origin: m(icrowave) a(mplification by) s(timulated) e(mission of) r(adiation)

See maser in American Heritage Dictionary 4

noun

Any of several devices that amplify or generate electromagnetic waves, especially microwaves.

Origin:

Origin: m(icrowave) a(mplification by) s(timulated) e(mission of) r(adiation)

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