"pesce rondine" meaning in Italian

{
  "forms": [
    {
      "form": "pesci rondine",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "+first"
      },
      "expansion": "pesce rondine m (plural pesci rondine)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "lifeform",
          "langcode": "it",
          "name": "Beloniform fish",
          "orig": "it:Beloniform fish",
          "parents": [
            "Fish",
            "Vertebrates",
            "Chordates",
            "Animals",
            "Lifeforms",
            "All topics",
            "Life",
            "Fundamental",
            "Nature"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of pesce volante"
      ],
      "id": "en-pesce_rondine-it-noun-QYlk5R26",
      "links": [
        [
          "pesce volante",
          "pesce volante#Italian"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "pesce volante"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "pesce rondine"
}

{
  "forms": [
    {
      "form": "pesci rondine",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m",
        "2": "+first"
      },
      "expansion": "pesce rondine m (plural pesci rondine)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian lemmas",
        "Italian masculine nouns",
        "Italian multiword terms",
        "Italian nouns",
        "it:Beloniform fish"
      ],
      "glosses": [
        "Synonym of pesce volante"
      ],
      "links": [
        [
          "pesce volante",
          "pesce volante#Italian"
        ]
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "pesce volante"
        }
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "word": "pesce rondine"
}