"Secchi depth" meaning in English

{
  "etymology_templates": [
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      "args": {
        "1": "en",
        "2": "Secchi disk"
      },
      "expansion": "Secchi disk",
      "name": "m"
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    {
      "args": {
        "1": "en",
        "2": "depth"
      },
      "expansion": "depth",
      "name": "m"
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    {
      "args": {
        "1": "en",
        "2": "it",
        "3": "Secchi"
      },
      "expansion": "Italian Secchi",
      "name": "der"
    }
  ],
  "etymology_text": "From Secchi disk + depth, from Italian Secchi, from Angelo Secchi.",
  "forms": [
    {
      "form": "Secchi depths",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Secchi depth (plural Secchi depths)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "kind": "topical",
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            "Sciences",
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            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "A measure of the turbidity of a body of water; the depth at which a Secchi disk is no longer visible."
      ],
      "id": "en-Secchi_depth-en-noun-EjERhTaS",
      "links": [
        [
          "turbidity",
          "turbidity"
        ],
        [
          "Secchi disk",
          "Secchi disk"
        ]
      ],
      "related": [
        {
          "word": "Secchi disc"
        }
      ],
      "translations": [
        {
          "code": "it",
          "lang": "Italian",
          "sense": "Translations",
          "word": "profondità di scomparsa del disco di Secchi"
        }
      ],
      "wikipedia": [
        "en:Angelo Secchi"
      ]
    }
  ],
  "word": "Secchi depth"
}

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    {
      "args": {
        "1": "en",
        "2": "Secchi disk"
      },
      "expansion": "Secchi disk",
      "name": "m"
    },
    {
      "args": {
        "1": "en",
        "2": "depth"
      },
      "expansion": "depth",
      "name": "m"
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    {
      "args": {
        "1": "en",
        "2": "it",
        "3": "Secchi"
      },
      "expansion": "Italian Secchi",
      "name": "der"
    }
  ],
  "etymology_text": "From Secchi disk + depth, from Italian Secchi, from Angelo Secchi.",
  "forms": [
    {
      "form": "Secchi depths",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "Secchi depth (plural Secchi depths)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "Secchi disc"
    }
  ],
  "senses": [
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        "Translation table header lacks gloss",
        "en:Optics",
        "en:Water"
      ],
      "glosses": [
        "A measure of the turbidity of a body of water; the depth at which a Secchi disk is no longer visible."
      ],
      "links": [
        [
          "turbidity",
          "turbidity"
        ],
        [
          "Secchi disk",
          "Secchi disk"
        ]
      ],
      "wikipedia": [
        "en:Angelo Secchi"
      ]
    }
  ],
  "translations": [
    {
      "code": "it",
      "lang": "Italian",
      "sense": "Translations",
      "word": "profondità di scomparsa del disco di Secchi"
    }
  ],
  "word": "Secchi depth"
}