"hydrometrograph" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "hydro-",
        "3": "metro-",
        "4": "-graph"
      },
      "expansion": "hydro- + metro- + -graph",
      "name": "af"
    }
  ],
  "etymology_text": "hydro- + metro- + -graph",
  "forms": [
    {
      "form": "hydrometrographs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hydrometrograph (plural hydrometrographs)",
      "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": "English terms prefixed with hydro-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with metro-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -graph",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "An instrument for measuring and recording the quantity of water discharged from a pipe, etc."
      ],
      "id": "en-hydrometrograph-en-noun-VdYSdHjo",
      "links": [
        [
          "instrument",
          "instrument"
        ],
        [
          "water",
          "water"
        ],
        [
          "pipe",
          "pipe"
        ]
      ]
    }
  ],
  "word": "hydrometrograph"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "hydro-",
        "3": "metro-",
        "4": "-graph"
      },
      "expansion": "hydro- + metro- + -graph",
      "name": "af"
    }
  ],
  "etymology_text": "hydro- + metro- + -graph",
  "forms": [
    {
      "form": "hydrometrographs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "hydrometrograph (plural hydrometrographs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with hydro-",
        "English terms prefixed with metro-",
        "English terms suffixed with -graph"
      ],
      "glosses": [
        "An instrument for measuring and recording the quantity of water discharged from a pipe, etc."
      ],
      "links": [
        [
          "instrument",
          "instrument"
        ],
        [
          "water",
          "water"
        ],
        [
          "pipe",
          "pipe"
        ]
      ]
    }
  ],
  "word": "hydrometrograph"
}