"Campus Martius" meaning in Latin

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      "text": "Italian: Campo Marzio"
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      "text": "Russian: Марсово поле (Marsovo pole)"
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  ],
  "etymology_text": "Derived from campus and Mārtius. Literally meaning \"the field of Mars\".",
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        "genitive"
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        "genitive"
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      "form": "Campus Mārtius",
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        "genitive",
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    {
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      "source": "declension",
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      "form": "Campō Mārtiō",
      "source": "declension",
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        "dative",
        "singular"
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    },
    {
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        "accusative",
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      "source": "declension",
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        "ablative",
        "singular"
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    },
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        "vocative"
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        "Campus Martius"
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      "ipa": "/ˈkam.pus ˈmaːr.ti.us/",
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      "ipa": "[ˈkämpʊs̠ ˈmäːrt̪iʊs̠]",
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        "Classical-Latin"
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      "ipa": "/ˈkam.pus ˈmar.t͡si.us/",
      "note": "modern Italianate Ecclesiastical"
    },
    {
      "ipa": "[ˈkämpus ˈmärt̪͡s̪ius]",
      "note": "modern Italianate Ecclesiastical"
    }
  ],
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      "source": "declension",
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        "ablative",
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        "Classical-Latin"
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      "ipa": "/ˈkam.pus ˈmar.t͡si.us/",
      "note": "modern Italianate Ecclesiastical"
    },
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      "ipa": "[ˈkämpus ˈmärt̪͡s̪ius]",
      "note": "modern Italianate Ecclesiastical"
    }
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}