Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. 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.

from the GNU version of the Collaborative International Dictionary of English

  • 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.

from The Century Dictionary and Cyclopedia

  • n. An instrument for illustrating sound by means of light.

Etymologies

Ancient Greek (Wiktionary)

Examples

Sorry, no example sentences found.

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.

  • The opeidoscope consists of a tube closed at one end by a taught membrane with a small mirror attached to its center, which vibrates in response to sound entering the tube at the open end, thereby causing a spot of light reflected by the mirror on to a screen to vibrate with varying amplitude and frequency according to the intensity and frequency of the sound.

    August 4, 2008