"Roberval balance" meaning in English

{
  "etymology_text": "Presented to the French Academy of Sciences by the French mathematician Gilles Personne de Roberval in 1669.",
  "forms": [
    {
      "form": "Roberval balances",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Roberval balance (plural Roberval balances)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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          "kind": "other",
          "name": "English entries with incorrect language header",
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            "Entries with incorrect language header",
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          "source": "w"
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          "parents": [
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      ],
      "glosses": [
        "A kind of weighing scale with two identical horizontal beams attached, one directly above the other, to a vertical column."
      ],
      "id": "en-Roberval_balance-en-noun-NBqovXFG",
      "synonyms": [
        {
          "word": "Roberval's balance"
        }
      ],
      "wikipedia": [
        "Roberval balance"
      ]
    }
  ],
  "word": "Roberval balance"
}

{
  "etymology_text": "Presented to the French Academy of Sciences by the French mathematician Gilles Personne de Roberval in 1669.",
  "forms": [
    {
      "form": "Roberval balances",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Roberval balance (plural Roberval balances)",
      "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"
      ],
      "glosses": [
        "A kind of weighing scale with two identical horizontal beams attached, one directly above the other, to a vertical column."
      ],
      "wikipedia": [
        "Roberval balance"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "Roberval's balance"
    }
  ],
  "word": "Roberval balance"
}