"магнием" meaning in Ruso

{
  "categories": [
    {
      "kind": "other",
      "name": "RU:Rimas:əɡnʲɪ(j)ɪm",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Ruso",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Ruso",
  "lang_code": "ru",
  "pos": "noun",
  "pos_title": "forma sustantiva",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "RU:Formas sustantivas en instrumental",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "RU:Formas sustantivas en singular",
          "parents": [],
          "source": "w"
        }
      ],
      "form_of": [
        {
          "word": "магний"
        }
      ],
      "glosses": [
        "Forma del instrumental singular de магний."
      ],
      "id": "es-магнием-ru-noun-8Aoi7NeV",
      "sense_index": "1"
    }
  ],
  "sounds": [
    {
      "ipa": "[məɡnʲɪ(j)ɪm]"
    },
    {
      "roman": "magnijem"
    },
    {
      "rhymes": "əɡnʲɪ(j)ɪm"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "магнием"
}

{
  "categories": [
    "RU:Rimas:əɡnʲɪ(j)ɪm",
    "Ruso"
  ],
  "lang": "Ruso",
  "lang_code": "ru",
  "pos": "noun",
  "pos_title": "forma sustantiva",
  "senses": [
    {
      "categories": [
        "RU:Formas sustantivas en instrumental",
        "RU:Formas sustantivas en singular"
      ],
      "form_of": [
        {
          "word": "магний"
        }
      ],
      "glosses": [
        "Forma del instrumental singular de магний."
      ],
      "sense_index": "1"
    }
  ],
  "sounds": [
    {
      "ipa": "[məɡnʲɪ(j)ɪm]"
    },
    {
      "roman": "magnijem"
    },
    {
      "rhymes": "əɡnʲɪ(j)ɪm"
    }
  ],
  "tags": [
    "form-of"
  ],
  "word": "магнием"
}