"mock silver" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "el",
        "2": "ψευδάργυρος",
        "3": "",
        "4": "zinc"
      },
      "expansion": "Greek ψευδάργυρος (psevdárgyros, “zinc”)",
      "name": "cog"
    }
  ],
  "etymology_text": "Compare modern Greek ψευδάργυρος (psevdárgyros, “zinc”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "mock silver (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"
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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Alchemy",
          "orig": "en:Alchemy",
          "parents": [
            "Forteana",
            "Pseudoscience",
            "Sciences",
            "All topics",
            "Fundamental"
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          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Obsolete element names",
          "orig": "en:Obsolete element names",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Zinc",
          "orig": "en:Zinc",
          "parents": [
            "Transition metals",
            "Chemical elements",
            "Metals",
            "Matter",
            "Metallurgy",
            "Chemistry",
            "Nature",
            "Technology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A metal known to the ancients, possibly zinc."
      ],
      "id": "en-mock_silver-en-noun-7BY2N-BV",
      "links": [
        [
          "alchemy",
          "alchemy"
        ],
        [
          "metal",
          "metal"
        ],
        [
          "zinc",
          "zinc"
        ]
      ],
      "raw_glosses": [
        "(obsolete, alchemy) A metal known to the ancients, possibly zinc."
      ],
      "tags": [
        "obsolete",
        "uncountable"
      ],
      "topics": [
        "alchemy",
        "pseudoscience"
      ]
    }
  ],
  "word": "mock silver"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "el",
        "2": "ψευδάργυρος",
        "3": "",
        "4": "zinc"
      },
      "expansion": "Greek ψευδάργυρος (psevdárgyros, “zinc”)",
      "name": "cog"
    }
  ],
  "etymology_text": "Compare modern Greek ψευδάργυρος (psevdárgyros, “zinc”).",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "mock silver (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
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        "en:Zinc"
      ],
      "glosses": [
        "A metal known to the ancients, possibly zinc."
      ],
      "links": [
        [
          "alchemy",
          "alchemy"
        ],
        [
          "metal",
          "metal"
        ],
        [
          "zinc",
          "zinc"
        ]
      ],
      "raw_glosses": [
        "(obsolete, alchemy) A metal known to the ancients, possibly zinc."
      ],
      "tags": [
        "obsolete",
        "uncountable"
      ],
      "topics": [
        "alchemy",
        "pseudoscience"
      ]
    }
  ],
  "word": "mock silver"
}