"otacousticon" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "οὖς",
        "4": "",
        "5": "ear"
      },
      "expansion": "Ancient Greek οὖς (oûs, “ear”)",
      "name": "uder"
    },
    {
      "args": {
        "1": "grc",
        "2": "ἀκουστικόν"
      },
      "expansion": "ἀκουστικόν (akoustikón)",
      "name": "m"
    },
    {
      "args": {
        "1": "grc",
        "2": "ἀκουστικός",
        "3": "",
        "4": "acoustic"
      },
      "expansion": "ἀκουστικός (akoustikós, “acoustic”)",
      "name": "m"
    }
  ],
  "etymology_text": "From combining form of Ancient Greek οὖς (oûs, “ear”) + ἀκουστικόν (akoustikón), neuter of ἀκουστικός (akoustikós, “acoustic”).",
  "forms": [
    {
      "form": "otacousticons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "otacousticon (plural otacousticons)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w"
        },
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          "kind": "other",
          "name": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
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          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": ", New York Review of Books, 2001, p.69",
          "text": "[…] Gyges' invisible ring, or some rare perspective glass, or otacousticon, which would so multiply species that a man might hear and see all at once […]."
        }
      ],
      "glosses": [
        "An instrument to aid hearing, such as an ear trumpet or hearing aid."
      ],
      "id": "en-otacousticon-en-noun-HD459jc6",
      "links": [
        [
          "hearing",
          "hearing"
        ],
        [
          "ear trumpet",
          "ear trumpet"
        ],
        [
          "hearing aid",
          "hearing aid"
        ]
      ],
      "raw_glosses": [
        "(now rare) An instrument to aid hearing, such as an ear trumpet or hearing aid."
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/əʊtəˈkuːstɪkɒn/",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "otacousticon"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "οὖς",
        "4": "",
        "5": "ear"
      },
      "expansion": "Ancient Greek οὖς (oûs, “ear”)",
      "name": "uder"
    },
    {
      "args": {
        "1": "grc",
        "2": "ἀκουστικόν"
      },
      "expansion": "ἀκουστικόν (akoustikón)",
      "name": "m"
    },
    {
      "args": {
        "1": "grc",
        "2": "ἀκουστικός",
        "3": "",
        "4": "acoustic"
      },
      "expansion": "ἀκουστικός (akoustikós, “acoustic”)",
      "name": "m"
    }
  ],
  "etymology_text": "From combining form of Ancient Greek οὖς (oûs, “ear”) + ἀκουστικόν (akoustikón), neuter of ἀκουστικός (akoustikós, “acoustic”).",
  "forms": [
    {
      "form": "otacousticons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "otacousticon (plural otacousticons)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English 5-syllable words",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms derived from Ancient Greek",
        "English terms with IPA pronunciation",
        "English terms with rare senses",
        "English undefined derivations"
      ],
      "examples": [
        {
          "ref": ", New York Review of Books, 2001, p.69",
          "text": "[…] Gyges' invisible ring, or some rare perspective glass, or otacousticon, which would so multiply species that a man might hear and see all at once […]."
        }
      ],
      "glosses": [
        "An instrument to aid hearing, such as an ear trumpet or hearing aid."
      ],
      "links": [
        [
          "hearing",
          "hearing"
        ],
        [
          "ear trumpet",
          "ear trumpet"
        ],
        [
          "hearing aid",
          "hearing aid"
        ]
      ],
      "raw_glosses": [
        "(now rare) An instrument to aid hearing, such as an ear trumpet or hearing aid."
      ],
      "tags": [
        "archaic"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/əʊtəˈkuːstɪkɒn/",
      "tags": [
        "UK"
      ]
    }
  ],
  "word": "otacousticon"
}