"cold cathode" meaning in English

{
  "forms": [
    {
      "form": "cold cathodes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cold cathode (plural cold cathodes)",
      "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"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Electronics",
          "orig": "en:Electronics",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "hot cathode"
        }
      ],
      "derived": [
        {
          "english": "CCFL",
          "word": "cold-cathode fluorescent lamp"
        },
        {
          "word": "cold-cathode lamp"
        },
        {
          "word": "cold-cathode light"
        },
        {
          "word": "cold-cathode tube"
        }
      ],
      "examples": [
        {
          "ref": "1962 June, “The Eastern Region completes the Colchester scheme”, in Modern Railways, page 412",
          "text": "On the open portions of the platforms the loudspeakers are installed on the cold cathode lighting columns.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A type of cathode that does not use a heating element to produce emission of cathode rays (electrons), beyond base thermionic emission (usually by field electron emission, secondary emission, photoelectric emission)"
      ],
      "hypernyms": [
        {
          "word": "cathode"
        }
      ],
      "id": "en-cold_cathode-en-noun-CxhJlo3H",
      "links": [
        [
          "electronics",
          "electronics"
        ],
        [
          "cathode",
          "cathode"
        ],
        [
          "heating element",
          "heating element"
        ],
        [
          "cathode ray",
          "cathode ray"
        ],
        [
          "electron",
          "electron"
        ]
      ],
      "raw_glosses": [
        "(electronics) A type of cathode that does not use a heating element to produce emission of cathode rays (electrons), beyond base thermionic emission (usually by field electron emission, secondary emission, photoelectric emission)"
      ],
      "topics": [
        "business",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "electronics",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "wikipedia": [
        "en:cold cathode"
      ]
    }
  ],
  "word": "cold cathode"
}

{
  "coordinate_terms": [
    {
      "word": "hot cathode"
    }
  ],
  "derived": [
    {
      "english": "CCFL",
      "word": "cold-cathode fluorescent lamp"
    },
    {
      "word": "cold-cathode lamp"
    },
    {
      "word": "cold-cathode light"
    },
    {
      "word": "cold-cathode tube"
    }
  ],
  "forms": [
    {
      "form": "cold cathodes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "cold cathode (plural cold cathodes)",
      "name": "en-noun"
    }
  ],
  "hypernyms": [
    {
      "word": "cathode"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:Electronics"
      ],
      "examples": [
        {
          "ref": "1962 June, “The Eastern Region completes the Colchester scheme”, in Modern Railways, page 412",
          "text": "On the open portions of the platforms the loudspeakers are installed on the cold cathode lighting columns.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "A type of cathode that does not use a heating element to produce emission of cathode rays (electrons), beyond base thermionic emission (usually by field electron emission, secondary emission, photoelectric emission)"
      ],
      "links": [
        [
          "electronics",
          "electronics"
        ],
        [
          "cathode",
          "cathode"
        ],
        [
          "heating element",
          "heating element"
        ],
        [
          "cathode ray",
          "cathode ray"
        ],
        [
          "electron",
          "electron"
        ]
      ],
      "raw_glosses": [
        "(electronics) A type of cathode that does not use a heating element to produce emission of cathode rays (electrons), beyond base thermionic emission (usually by field electron emission, secondary emission, photoelectric emission)"
      ],
      "topics": [
        "business",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "electronics",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "wikipedia": [
        "en:cold cathode"
      ]
    }
  ],
  "word": "cold cathode"
}