"Bath brick" meaning in English

{
  "etymology_text": "From the city of Bath in England.",
  "forms": [
    {
      "form": "Bath bricks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "Bath brick (countable and uncountable, plural Bath bricks)",
      "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"
        }
      ],
      "glosses": [
        "A preparation of calcareous earth, in the form of a brick, used for cleaning knives etc."
      ],
      "id": "en-Bath_brick-en-noun-mdX50Q7j",
      "links": [
        [
          "preparation",
          "preparation"
        ],
        [
          "calcareous",
          "calcareous"
        ],
        [
          "earth",
          "earth"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "Bath brick"
}

{
  "etymology_text": "From the city of Bath in England.",
  "forms": [
    {
      "form": "Bath bricks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "Bath brick (countable and uncountable, plural Bath bricks)",
      "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"
      ],
      "glosses": [
        "A preparation of calcareous earth, in the form of a brick, used for cleaning knives etc."
      ],
      "links": [
        [
          "preparation",
          "preparation"
        ],
        [
          "calcareous",
          "calcareous"
        ],
        [
          "earth",
          "earth"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "Bath brick"
}