"vacca pregna" meaning in Corsican

{
  "etymology_text": "From vacca (“peacock blenny”) + pregna, feminine of pregnu (“pregnant”).",
  "head_templates": [
    {
      "args": {
        "1": "co",
        "2": "noun",
        "g": "f"
      },
      "expansion": "vacca pregna f",
      "name": "head"
    }
  ],
  "lang": "Corsican",
  "lang_code": "co",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Corsican entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "co",
          "name": "Blennies",
          "orig": "co:Blennies",
          "parents": [
            "Fish",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "co",
          "name": "Ichthyology",
          "orig": "co:Ichthyology",
          "parents": [
            "Zoology",
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "rusty blenny (Parablennius sanguinolentus)"
      ],
      "id": "en-vacca_pregna-co-noun-Bh6VpIAW",
      "links": [
        [
          "rusty blenny",
          "rusty blenny"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "vacca pregna"
}

{
  "etymology_text": "From vacca (“peacock blenny”) + pregna, feminine of pregnu (“pregnant”).",
  "head_templates": [
    {
      "args": {
        "1": "co",
        "2": "noun",
        "g": "f"
      },
      "expansion": "vacca pregna f",
      "name": "head"
    }
  ],
  "lang": "Corsican",
  "lang_code": "co",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Corsican entries with incorrect language header",
        "Corsican feminine nouns",
        "Corsican lemmas",
        "Corsican multiword terms",
        "Corsican nouns",
        "co:Blennies",
        "co:Ichthyology"
      ],
      "glosses": [
        "rusty blenny (Parablennius sanguinolentus)"
      ],
      "links": [
        [
          "rusty blenny",
          "rusty blenny"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "vacca pregna"
}