"headtube" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "head",
        "3": "tube"
      },
      "expansion": "head + tube",
      "name": "compound"
    }
  ],
  "etymology_text": "From head + tube.",
  "forms": [
    {
      "form": "headtubes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "headtube (plural headtubes)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
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          "source": "w"
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          "parents": [],
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        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Bicycle parts",
          "orig": "en:Bicycle parts",
          "parents": [
            "Cycling",
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "The front tube of the frame of a bicycle."
      ],
      "id": "en-headtube-en-noun-rybQUiYE",
      "links": [
        [
          "tube",
          "tube"
        ],
        [
          "frame",
          "frame"
        ],
        [
          "bicycle",
          "bicycle"
        ]
      ],
      "translations": [
        {
          "code": "fi",
          "lang": "Finnish",
          "sense": "front tube",
          "word": "emäputki"
        },
        {
          "code": "hu",
          "lang": "Hungarian",
          "sense": "front tube",
          "word": "fejcső"
        }
      ]
    }
  ],
  "word": "headtube"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "head",
        "3": "tube"
      },
      "expansion": "head + tube",
      "name": "compound"
    }
  ],
  "etymology_text": "From head + tube.",
  "forms": [
    {
      "form": "headtubes",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "headtube (plural headtubes)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Bicycle parts"
      ],
      "glosses": [
        "The front tube of the frame of a bicycle."
      ],
      "links": [
        [
          "tube",
          "tube"
        ],
        [
          "frame",
          "frame"
        ],
        [
          "bicycle",
          "bicycle"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "fi",
      "lang": "Finnish",
      "sense": "front tube",
      "word": "emäputki"
    },
    {
      "code": "hu",
      "lang": "Hungarian",
      "sense": "front tube",
      "word": "fejcső"
    }
  ],
  "word": "headtube"
}