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exciter lamp

American  

noun

  1. a lamp that produces a light that passes through a film soundtrack and impinges on a photoelective cell causing current fluctuations that actuate a loudspeaker.

Etymology

Origin of exciter lamp

First recorded in 1935–40

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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