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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Dictionary Entries near opeidoscope

OPEC

op-ed

Opegrapha

opeidoscope

opelet

Opelika

Opelousas

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