"UMi" meaning in Conventions internationales

{
  "categories": [
    {
      "kind": "other",
      "name": "Abréviations en conventions internationales",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Noms scientifiques",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Conventions internationales",
      "orig": "conventions internationales",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "(Abréviation) (1922)  Abréviation du génitif latin Ursae Minoris. On utilise UMi pour la départager de UMa (génitif Ursae Majoris), qui désigne la Grande Ourse."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "noun",
  "pos_title": "Nom scientifique",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Constellations en conventions internationales",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Abréviation latine désignant la constellation de la Petite Ourse."
      ],
      "id": "fr-UMi-conv-noun-7npMVGhN",
      "topics": [
        "astronomy"
      ]
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "UMi"
}

{
  "categories": [
    "Abréviations en conventions internationales",
    "Noms scientifiques",
    "conventions internationales"
  ],
  "etymology_texts": [
    "(Abréviation) (1922)  Abréviation du génitif latin Ursae Minoris. On utilise UMi pour la départager de UMa (génitif Ursae Majoris), qui désigne la Grande Ourse."
  ],
  "lang": "Conventions internationales",
  "lang_code": "conv",
  "pos": "noun",
  "pos_title": "Nom scientifique",
  "senses": [
    {
      "categories": [
        "Constellations en conventions internationales"
      ],
      "glosses": [
        "Abréviation latine désignant la constellation de la Petite Ourse."
      ],
      "topics": [
        "astronomy"
      ]
    }
  ],
  "tags": [
    "invariable"
  ],
  "word": "UMi"
}