"Μεσογείου Θαλάσσης" meaning in Greek

{
  "forms": [
    {
      "form": "Mesogeíou Thalássis",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "proper noun form",
        "g": "f",
        "head": "Μεσογείου Θαλάσσης"
      },
      "expansion": "Μεσογείου Θαλάσσης • (Mesogeíou Thalássis) f",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "name",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Greek entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "extra": "Mesógeios Thálassa",
          "word": "Μεσόγειος Θάλασσα"
        }
      ],
      "glosses": [
        "Genitive form of Μεσόγειος Θάλασσα (Mesógeios Thálassa)."
      ],
      "id": "en-Μεσογείου_Θαλάσσης-el-name-jz9mQxIT",
      "links": [
        [
          "Genitive",
          "genitive"
        ],
        [
          "Μεσόγειος Θάλασσα",
          "Μεσόγειος Θάλασσα#Greek"
        ]
      ],
      "tags": [
        "form-of",
        "genitive"
      ]
    }
  ],
  "word": "Μεσογείου Θαλάσσης"
}

{
  "forms": [
    {
      "form": "Mesogeíou Thalássis",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "2": "proper noun form",
        "g": "f",
        "head": "Μεσογείου Θαλάσσης"
      },
      "expansion": "Μεσογείου Θαλάσσης • (Mesogeíou Thalássis) f",
      "name": "head"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "Greek entries with incorrect language header",
        "Greek non-lemma forms",
        "Greek proper noun forms"
      ],
      "form_of": [
        {
          "extra": "Mesógeios Thálassa",
          "word": "Μεσόγειος Θάλασσα"
        }
      ],
      "glosses": [
        "Genitive form of Μεσόγειος Θάλασσα (Mesógeios Thálassa)."
      ],
      "links": [
        [
          "Genitive",
          "genitive"
        ],
        [
          "Μεσόγειος Θάλασσα",
          "Μεσόγειος Θάλασσα#Greek"
        ]
      ],
      "tags": [
        "form-of",
        "genitive"
      ]
    }
  ],
  "word": "Μεσογείου Θαλάσσης"
}