"planometer" meaning in English

{
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    {
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        "2": "plano-",
        "3": "-meter"
      },
      "expansion": "plano- + -meter",
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  ],
  "etymology_text": "From plano- + -meter.",
  "forms": [
    {
      "form": "planometers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "args": {},
      "expansion": "planometer (plural planometers)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
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          "name": "English terms prefixed with plano-",
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        {
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          "name": "English terms suffixed with -meter",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Measuring instruments",
          "orig": "en:Measuring instruments",
          "parents": [
            "Tools",
            "Technology",
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            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "A flat, metal plate used for estimating the flatness of a machined part; a surface plate."
      ],
      "id": "en-planometer-en-noun-HtGfVWEu",
      "links": [
        [
          "plate",
          "plate"
        ],
        [
          "flatness",
          "flatness"
        ],
        [
          "machined",
          "machined"
        ],
        [
          "part",
          "part"
        ],
        [
          "surface plate",
          "surface plate"
        ]
      ],
      "related": [
        {
          "word": "planometric"
        },
        {
          "word": "planometry"
        }
      ]
    }
  ],
  "word": "planometer"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "plano-",
        "3": "-meter"
      },
      "expansion": "plano- + -meter",
      "name": "affix"
    }
  ],
  "etymology_text": "From plano- + -meter.",
  "forms": [
    {
      "form": "planometers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "planometer (plural planometers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "planometric"
    },
    {
      "word": "planometry"
    }
  ],
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      "glosses": [
        "A flat, metal plate used for estimating the flatness of a machined part; a surface plate."
      ],
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        [
          "plate",
          "plate"
        ],
        [
          "flatness",
          "flatness"
        ],
        [
          "machined",
          "machined"
        ],
        [
          "part",
          "part"
        ],
        [
          "surface plate",
          "surface plate"
        ]
      ]
    }
  ],
  "word": "planometer"
}