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Bible Dictionaries
Phoneidoscope

Webster's Dictionary

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(n.) An instrument for studying the motions of sounding bodies by optical means. It consists of a tube across the end of which is stretched a film of soap solution thin enough to give colored bands, the form and position of which are affected by sonorous vibrations.

Bibliography Information
Webster, Noah. Entry for 'Phoneidoscope'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​p/phoneidoscope.html. 1828.
 
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