opeidoscope

noun
opei·​do·​scope | \ ōˈpīdəˌskōp \

Definition of opeidoscope

: an instrument consisting essentially of a tube across one end of which is stretched a thin flexible membrane bearing a small mirror and used for exhibiting upon a screen by rays reflected from the mirror vibratory motions caused by sounds

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History and Etymology for opeidoscope

Greek opa (accusative) voice + eidos form + English -scope

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Cite this Entry

“Opeidoscope.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/opeidoscope. Accessed 26 Oct. 2020.

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