"Gavia immer" meaning in Conventions internationales

{
  "categories": [
    {
      "kind": "other",
      "name": "Mots en conventions internationales issus d’un mot en islandais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Mots en conventions internationales issus d’un mot en latin",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms scientifiques",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Conventions internationales",
      "orig": "conventions internationales",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Du latin gavia (« mouette ») et immer, de l’islandais himbrimi (« imbrin »)"
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "name",
  "pos_title": "Nom scientifique",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Oiseaux en conventions internationales",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Plongeon imbrin."
      ],
      "id": "fr-Gavia_immer-conv-name-BTk16GTs",
      "topics": [
        "ornithology"
      ]
    }
  ],
  "tags": [
    "scientific"
  ],
  "word": "Gavia immer"
}

{
  "categories": [
    "Mots en conventions internationales issus d’un mot en islandais",
    "Mots en conventions internationales issus d’un mot en latin",
    "Noms scientifiques",
    "conventions internationales"
  ],
  "etymology_texts": [
    "Du latin gavia (« mouette ») et immer, de l’islandais himbrimi (« imbrin »)"
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "name",
  "pos_title": "Nom scientifique",
  "senses": [
    {
      "categories": [
        "Oiseaux en conventions internationales"
      ],
      "glosses": [
        "Plongeon imbrin."
      ],
      "topics": [
        "ornithology"
      ]
    }
  ],
  "tags": [
    "scientific"
  ],
  "word": "Gavia immer"
}