opeidoscope

名词 n.
中文释义

英文释义

名词 n.
  1. 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.
    — Among many experiments in transmitting speech I tried that of a conical point of iron fastened to the middle of an opeidoscope membrane, the point being attached to a fine wire in such a manner as not to interfere with its freedom of movement […]

词形变化

opeidoscopes plural

词源

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