"knockstone" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "knock",
        "3": "stone"
      },
      "expansion": "knock + stone",
      "name": "compound"
    }
  ],
  "etymology_text": "From knock + stone.",
  "forms": [
    {
      "form": "knockstones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "knockstone (plural knockstones)",
      "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": "Mining",
          "orig": "en:Mining",
          "parents": [
            "Industries",
            "Business",
            "Economics",
            "Society",
            "Social sciences",
            "All topics",
            "Sciences",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A block upon which ore is broken up."
      ],
      "id": "en-knockstone-en-noun-8uvGKXxp",
      "links": [
        [
          "mining",
          "mining#Noun"
        ],
        [
          "block",
          "block"
        ],
        [
          "ore",
          "ore"
        ]
      ],
      "raw_glosses": [
        "(mining) A block upon which ore is broken up."
      ],
      "topics": [
        "business",
        "mining"
      ]
    }
  ],
  "word": "knockstone"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "knock",
        "3": "stone"
      },
      "expansion": "knock + stone",
      "name": "compound"
    }
  ],
  "etymology_text": "From knock + stone.",
  "forms": [
    {
      "form": "knockstones",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "knockstone (plural knockstones)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Mining"
      ],
      "glosses": [
        "A block upon which ore is broken up."
      ],
      "links": [
        [
          "mining",
          "mining#Noun"
        ],
        [
          "block",
          "block"
        ],
        [
          "ore",
          "ore"
        ]
      ],
      "raw_glosses": [
        "(mining) A block upon which ore is broken up."
      ],
      "topics": [
        "business",
        "mining"
      ]
    }
  ],
  "word": "knockstone"
}