"gilding metal" meaning in English

{
  "forms": [
    {
      "form": "gilding metals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "gilding metal (usually uncountable, plural gilding metals)",
      "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"
        },
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          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Metals",
          "orig": "en:Metals",
          "parents": [
            "Matter",
            "Metallurgy",
            "Chemistry",
            "Nature",
            "Technology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A tough kind of brass from which artillery shells, as well as some jewellery, are made."
      ],
      "id": "en-gilding_metal-en-noun-8BqFcdRE",
      "links": [
        [
          "tough",
          "tough"
        ],
        [
          "brass",
          "brass"
        ],
        [
          "artillery",
          "artillery"
        ],
        [
          "shell",
          "shell"
        ]
      ],
      "tags": [
        "uncountable",
        "usually"
      ]
    }
  ],
  "word": "gilding metal"
}

{
  "forms": [
    {
      "form": "gilding metals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "-",
        "2": "s"
      },
      "expansion": "gilding metal (usually uncountable, plural gilding metals)",
      "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",
        "English uncountable nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Metals"
      ],
      "glosses": [
        "A tough kind of brass from which artillery shells, as well as some jewellery, are made."
      ],
      "links": [
        [
          "tough",
          "tough"
        ],
        [
          "brass",
          "brass"
        ],
        [
          "artillery",
          "artillery"
        ],
        [
          "shell",
          "shell"
        ]
      ],
      "tags": [
        "uncountable",
        "usually"
      ]
    }
  ],
  "word": "gilding metal"
}