"порог различения" meaning in Russe

{
  "categories": [
    {
      "kind": "other",
      "name": "Déclinaisons manquantes en russe",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en russe",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Russe",
      "orig": "russe",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Russe",
  "lang_code": "ru",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "raw_tags": [
    "Déclinaisons manquantes ou à compléter. (Ajouter)"
  ],
  "senses": [
    {
      "glosses": [
        "Seuil différentiel."
      ],
      "id": "fr-порог_различения-ru-noun-a8XuDXdp"
    }
  ],
  "word": "порог различения"
}

{
  "categories": [
    "Déclinaisons manquantes en russe",
    "Locutions nominales en russe",
    "russe"
  ],
  "lang": "Russe",
  "lang_code": "ru",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "raw_tags": [
    "Déclinaisons manquantes ou à compléter. (Ajouter)"
  ],
  "senses": [
    {
      "glosses": [
        "Seuil différentiel."
      ]
    }
  ],
  "word": "порог различения"
}