"opeidoscope" meaning in English

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  "etymology_text": "Coined by its inventor Amos Dolbear, from Ancient Greek roots.",
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      "form": "opeidoscopes",
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          "ref": "1878, George Bartlett Prescott, The Speaking Telephone, Talking Phonograph, and Other Novelties:",
          "text": "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 […]",
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        {
          "ref": "1902, George Milton Hopkins, Experimental science:",
          "text": "This is a modification of the opeidoscope. A thin membrane of goldbeater's skin or rubber is stretched over a wooden or metallic cell and secured by a winding of thread. To the center of the membrane is cemented a small thin mirror.",
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        {
          "ref": "2009, May Berenbaum, The Earwig's Tail: A Modern Bestiary of Multi-legged Legends:",
          "text": "I can't help thinking that, had he lived to see the electronic cricket sensor, the inventor of the opeidoscope probably would have approved.",
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      "glosses": [
        "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."
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        [
          "mirror",
          "mirror"
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          "exhibit",
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          "screen",
          "screen"
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          "vibratory",
          "vibratory"
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        [
          "sound",
          "sound"
        ]
      ]
    }
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  "word": "opeidoscope"
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  "etymology_text": "Coined by its inventor Amos Dolbear, from Ancient Greek roots.",
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          "ref": "1878, George Bartlett Prescott, The Speaking Telephone, Talking Phonograph, and Other Novelties:",
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          "type": "quote"
        },
        {
          "ref": "1902, George Milton Hopkins, Experimental science:",
          "text": "This is a modification of the opeidoscope. A thin membrane of goldbeater's skin or rubber is stretched over a wooden or metallic cell and secured by a winding of thread. To the center of the membrane is cemented a small thin mirror.",
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  "word": "opeidoscope"
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