"rdza" meaning in Polonais

{
  "categories": [
    {
      "kind": "other",
      "name": "Polonais",
      "orig": "polonais",
      "parents": [],
      "source": "w"
    }
  ],
  "derived": [
    {
      "translation": "rouillé",
      "word": "rdzawy"
    },
    {
      "translation": "rouiller",
      "word": "rdzewieć"
    }
  ],
  "etymology_texts": [
    "Apparenté à rudy (« roux »), du vieux slave ръжда, rŭžda."
  ],
  "lang": "Polonais",
  "lang_code": "pl",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "examples": [
        {
          "text": "Rdza żre metal."
        }
      ],
      "glosses": [
        "Rouille."
      ],
      "id": "fr-rdza-pl-noun-jIp7rKHX"
    },
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en polonais de la botanique",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Rouille, maladie phytosanitaire."
      ],
      "id": "fr-rdza-pl-noun-iGHcSuYu",
      "topics": [
        "botany"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\rʣ̑a\\"
    }
  ],
  "synonyms": [
    {
      "word": "śniedź"
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "rdza"
}

{
  "categories": [
    "polonais"
  ],
  "derived": [
    {
      "translation": "rouillé",
      "word": "rdzawy"
    },
    {
      "translation": "rouiller",
      "word": "rdzewieć"
    }
  ],
  "etymology_texts": [
    "Apparenté à rudy (« roux »), du vieux slave ръжда, rŭžda."
  ],
  "lang": "Polonais",
  "lang_code": "pl",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "examples": [
        {
          "text": "Rdza żre metal."
        }
      ],
      "glosses": [
        "Rouille."
      ]
    },
    {
      "categories": [
        "Lexique en polonais de la botanique"
      ],
      "glosses": [
        "Rouille, maladie phytosanitaire."
      ],
      "topics": [
        "botany"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "\\rʣ̑a\\"
    }
  ],
  "synonyms": [
    {
      "word": "śniedź"
    }
  ],
  "tags": [
    "feminine"
  ],
  "word": "rdza"
}