"oxygen bottle" meaning in English

{
  "forms": [
    {
      "form": "oxygen bottles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "oxygen bottle (plural oxygen bottles)",
      "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": "Oxygen",
          "orig": "en:Oxygen",
          "parents": [
            "Chalcogens",
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Underwater diving",
          "orig": "en:Underwater diving",
          "parents": [
            "Water sports",
            "Sports",
            "Human activity",
            "Human behaviour",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "a small gas cylinder of oxygen used in mountain climbing or scuba diving etc"
      ],
      "id": "en-oxygen_bottle-en-noun--jgwjods",
      "links": [
        [
          "gas cylinder",
          "gas cylinder"
        ],
        [
          "mountain climbing",
          "mountain climbing"
        ],
        [
          "scuba diving",
          "scuba diving"
        ]
      ],
      "related": [
        {
          "word": "oxygen canister"
        },
        {
          "word": "oxygen candle"
        }
      ]
    }
  ],
  "word": "oxygen bottle"
}

{
  "forms": [
    {
      "form": "oxygen bottles",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "oxygen bottle (plural oxygen bottles)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "oxygen canister"
    },
    {
      "word": "oxygen candle"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Oxygen",
        "en:Underwater diving"
      ],
      "glosses": [
        "a small gas cylinder of oxygen used in mountain climbing or scuba diving etc"
      ],
      "links": [
        [
          "gas cylinder",
          "gas cylinder"
        ],
        [
          "mountain climbing",
          "mountain climbing"
        ],
        [
          "scuba diving",
          "scuba diving"
        ]
      ]
    }
  ],
  "word": "oxygen bottle"
}