"Chézy formula" meaning in English

{
  "etymology_text": "Named after Antoine de Chézy, the French hydraulics engineer who devised it in 1775.",
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  "lang": "English",
  "lang_code": "en",
  "pos": "name",
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          "name": "Fluid dynamics",
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      "glosses": [
        "A formula that describes the mean flow velocity of steady, turbulent open-channel flow."
      ],
      "id": "en-Chézy_formula-en-name-smTtwhxp",
      "links": [
        [
          "fluid dynamics",
          "fluid dynamics"
        ],
        [
          "mean",
          "mean"
        ],
        [
          "flow",
          "flow"
        ],
        [
          "velocity",
          "velocity"
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          "steady",
          "steady"
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          "turbulent",
          "turbulent"
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      "raw_glosses": [
        "(fluid dynamics) A formula that describes the mean flow velocity of steady, turbulent open-channel flow."
      ],
      "topics": [
        "fluid-dynamics",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "wikipedia": [
        "Chézy formula"
      ]
    }
  ],
  "word": "Chézy formula"
}

{
  "etymology_text": "Named after Antoine de Chézy, the French hydraulics engineer who devised it in 1775.",
  "forms": [
    {
      "form": "the Chézy formula",
      "tags": [
        "canonical"
      ]
    }
  ],
  "head_templates": [
    {
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  "lang_code": "en",
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      "glosses": [
        "A formula that describes the mean flow velocity of steady, turbulent open-channel flow."
      ],
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        [
          "fluid dynamics",
          "fluid dynamics"
        ],
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          "mean",
          "mean"
        ],
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          "flow"
        ],
        [
          "velocity",
          "velocity"
        ],
        [
          "steady",
          "steady"
        ],
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          "turbulent",
          "turbulent"
        ]
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      "raw_glosses": [
        "(fluid dynamics) A formula that describes the mean flow velocity of steady, turbulent open-channel flow."
      ],
      "topics": [
        "fluid-dynamics",
        "natural-sciences",
        "physical-sciences",
        "physics"
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