opeidoscope

The English word “opeidoscope” has 1 meaning listed here.

noun

An instrument, consisting of a tube with one end open and the other end covered with a thin flexible membrane with a mirror attached to its centre, used for exhibiting upon a screen, by means of rays reflected from the mirror, the vibratory motions caused by sounds that enter the tube.

Coined by its inventor Amos Dolbear, from Ancient Greek roots.

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