"base gas" meaning in English

{
  "forms": [
    {
      "form": "base gases",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "base gas (plural base gases)",
      "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": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Gases",
          "orig": "en:Gases",
          "parents": [
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physical chemistry",
          "orig": "en:Physical chemistry",
          "parents": [
            "Chemistry",
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A gas like ammonia that has basic properties."
      ],
      "id": "en-base_gas-en-noun-W~qUthh7",
      "links": [
        [
          "physical chemistry",
          "physical chemistry"
        ],
        [
          "ammonia",
          "ammonia"
        ],
        [
          "basic",
          "basic"
        ],
        [
          "properties",
          "properties"
        ]
      ],
      "raw_glosses": [
        "(physical chemistry) A gas like ammonia that has basic properties."
      ],
      "tags": [
        "physical"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "base gas"
}

{
  "forms": [
    {
      "form": "base gases",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "base gas (plural base gases)",
      "name": "en-noun"
    }
  ],
  "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",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Gases",
        "en:Physical chemistry"
      ],
      "glosses": [
        "A gas like ammonia that has basic properties."
      ],
      "links": [
        [
          "physical chemistry",
          "physical chemistry"
        ],
        [
          "ammonia",
          "ammonia"
        ],
        [
          "basic",
          "basic"
        ],
        [
          "properties",
          "properties"
        ]
      ],
      "raw_glosses": [
        "(physical chemistry) A gas like ammonia that has basic properties."
      ],
      "tags": [
        "physical"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "base gas"
}