"gigabarrel" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "giga",
        "3": "barrel"
      },
      "expansion": "giga- + barrel",
      "name": "prefix"
    }
  ],
  "etymology_text": "From giga- + barrel.",
  "forms": [
    {
      "form": "gigabarrels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "gigabarrel (plural gigabarrels)",
      "name": "en-noun"
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  "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"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with giga-",
          "parents": [],
          "source": "w"
        },
        {
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          "parents": [],
          "source": "w"
        },
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Units of measure",
          "orig": "en:Units of measure",
          "parents": [
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A unit of volume equal to a thousand million barrels."
      ],
      "id": "en-gigabarrel-en-noun-cXr0qvi~",
      "links": [
        [
          "unit",
          "unit"
        ],
        [
          "volume",
          "volume"
        ],
        [
          "thousand",
          "thousand"
        ],
        [
          "million",
          "million"
        ],
        [
          "barrel",
          "barrel"
        ]
      ]
    }
  ],
  "word": "gigabarrel"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "giga",
        "3": "barrel"
      },
      "expansion": "giga- + barrel",
      "name": "prefix"
    }
  ],
  "etymology_text": "From giga- + barrel.",
  "forms": [
    {
      "form": "gigabarrels",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "gigabarrel (plural gigabarrels)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
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      ],
      "glosses": [
        "A unit of volume equal to a thousand million barrels."
      ],
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        ],
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          "volume",
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        ],
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        [
          "million",
          "million"
        ],
        [
          "barrel",
          "barrel"
        ]
      ]
    }
  ],
  "word": "gigabarrel"
}