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opeidoscope

Opeidoscope is a 11 letter word which starts with the letter O and ends with the letter E for which we found 1 definitions.

Definition
(n.) An instrument consisting of a tube having one end open and the other end covered with a thin flexible membrance to the center of which is attached a small mirror. It is used for exhibiting upon a screen by means of rays reflected from the mirror the vibratory motions caused by sounds produced at the open end of the tube as by speaking or singing into it.
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