"variocoupler" meaning in English

{
  "forms": [
    {
      "form": "variocouplers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "variocoupler (plural variocouplers)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Measuring instruments",
          "orig": "en:Measuring instruments",
          "parents": [
            "Tools",
            "Technology",
            "All topics",
            "Fundamental"
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          "source": "w"
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      ],
      "glosses": [
        "A kind of variometer (magnetic instrument) constructed with two coils of wire that are connected not to each other but to separate circuits, so as to function as an air core RF transformer with variable coupling."
      ],
      "id": "en-variocoupler-en-noun-e1VB~7ID",
      "links": [
        [
          "variometer",
          "variometer"
        ],
        [
          "coil",
          "coil"
        ],
        [
          "wire",
          "wire"
        ],
        [
          "separate",
          "separate"
        ],
        [
          "circuit",
          "circuit"
        ]
      ]
    }
  ],
  "word": "variocoupler"
}

{
  "forms": [
    {
      "form": "variocouplers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "variocoupler (plural variocouplers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "Pages with 1 entry",
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        "en:Measuring instruments"
      ],
      "glosses": [
        "A kind of variometer (magnetic instrument) constructed with two coils of wire that are connected not to each other but to separate circuits, so as to function as an air core RF transformer with variable coupling."
      ],
      "links": [
        [
          "variometer",
          "variometer"
        ],
        [
          "coil",
          "coil"
        ],
        [
          "wire",
          "wire"
        ],
        [
          "separate",
          "separate"
        ],
        [
          "circuit",
          "circuit"
        ]
      ]
    }
  ],
  "word": "variocoupler"
}