"gray hydrogen" meaning in English

{
  "etymology_text": "From the color of smoke.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "gray hydrogen (uncountable)",
      "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": "Carbon",
          "orig": "en:Carbon",
          "parents": [
            "Carbon group elements",
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Fossil fuels",
          "orig": "en:Fossil fuels",
          "parents": [
            "Carbon",
            "Energy",
            "Natural resources",
            "Carbon group elements",
            "Nature",
            "Matter",
            "Chemical elements",
            "All topics",
            "Chemistry",
            "Fundamental",
            "Sciences"
          ],
          "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": "Hydrogen",
          "orig": "en:Hydrogen",
          "parents": [
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Organic chemistry",
          "orig": "en:Organic chemistry",
          "parents": [
            "Chemistry",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "coordinate_terms": [
        {
          "word": "steam reformation"
        },
        {
          "word": "syngas"
        }
      ],
      "derived": [
        {
          "word": "gray ammonia"
        }
      ],
      "glosses": [
        "hydrogen generated from hydrocarbon sources without attempting to capture and eliminate the waste carbon pollution"
      ],
      "hypernyms": [
        {
          "word": "hydrogen"
        }
      ],
      "id": "en-gray_hydrogen-en-noun-HO03VhGY",
      "links": [
        [
          "hydrogen",
          "hydrogen#English"
        ],
        [
          "hydrocarbon",
          "hydrocarbon#English"
        ]
      ],
      "related": [
        {
          "word": "black hydrogen"
        },
        {
          "word": "blue hydrogen"
        },
        {
          "word": "brown hydrogen"
        },
        {
          "word": "green hydrogen"
        }
      ],
      "synonyms": [
        {
          "word": "grey hydrogen"
        }
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "word": "gray hydrogen"
}

{
  "coordinate_terms": [
    {
      "word": "steam reformation"
    },
    {
      "word": "syngas"
    }
  ],
  "derived": [
    {
      "word": "gray ammonia"
    }
  ],
  "etymology_text": "From the color of smoke.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "gray hydrogen (uncountable)",
      "name": "en-noun"
    }
  ],
  "hypernyms": [
    {
      "word": "hydrogen"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "black hydrogen"
    },
    {
      "word": "blue hydrogen"
    },
    {
      "word": "brown hydrogen"
    },
    {
      "word": "green hydrogen"
    }
  ],
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Carbon",
        "en:Fossil fuels",
        "en:Gases",
        "en:Hydrogen",
        "en:Organic chemistry"
      ],
      "glosses": [
        "hydrogen generated from hydrocarbon sources without attempting to capture and eliminate the waste carbon pollution"
      ],
      "links": [
        [
          "hydrogen",
          "hydrogen#English"
        ],
        [
          "hydrocarbon",
          "hydrocarbon#English"
        ]
      ],
      "tags": [
        "uncountable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "grey hydrogen"
    }
  ],
  "word": "gray hydrogen"
}