"Knoop hardness" meaning in All languages combined

{
  "forms": [
    {
      "form": "Knoop hardnesses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "Knoop hardness (countable and uncountable, plural Knoop hardnesses)",
      "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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          "parents": [
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          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
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        },
        {
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          "name": "Pages with 1 entry",
          "parents": [],
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      ],
      "glosses": [
        "The microhardness of a material as measured by the Knoop test."
      ],
      "id": "en-Knoop_hardness-en-noun-1X0twbBx",
      "links": [
        [
          "microhardness",
          "microhardness"
        ],
        [
          "material",
          "material"
        ],
        [
          "Knoop test",
          "Knoop test"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "Knoop hardness"
}

{
  "forms": [
    {
      "form": "Knoop hardnesses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "Knoop hardness (countable and uncountable, plural Knoop hardnesses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English eponyms",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with non-redundant non-automated sortkeys",
        "English uncountable nouns",
        "Pages with 1 entry"
      ],
      "glosses": [
        "The microhardness of a material as measured by the Knoop test."
      ],
      "links": [
        [
          "microhardness",
          "microhardness"
        ],
        [
          "material",
          "material"
        ],
        [
          "Knoop test",
          "Knoop test"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "Knoop hardness"
}