"нуклеус" meaning in Russian

{
  "forms": [
    {
      "form": "ну́клеус",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "núkleus",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ну́клеуса",
      "tags": [
        "genitive"
      ]
    },
    {
      "form": "ну́клеусы",
      "tags": [
        "nominative",
        "plural"
      ]
    },
    {
      "form": "ну́клеусов",
      "tags": [
        "genitive",
        "plural"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "declension",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "ru-noun-table",
      "source": "declension",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "hard-stem",
      "source": "declension",
      "tags": [
        "class"
      ]
    },
    {
      "form": "accent-a",
      "source": "declension",
      "tags": [
        "class"
      ]
    },
    {
      "form": "ну́клеус",
      "roman": "núkleus",
      "source": "declension",
      "tags": [
        "nominative",
        "singular"
      ]
    },
    {
      "form": "ну́клеусы",
      "roman": "núkleusy",
      "source": "declension",
      "tags": [
        "nominative",
        "plural"
      ]
    },
    {
      "form": "ну́клеуса",
      "roman": "núkleusa",
      "source": "declension",
      "tags": [
        "genitive",
        "singular"
      ]
    },
    {
      "form": "ну́клеусов",
      "roman": "núkleusov",
      "source": "declension",
      "tags": [
        "genitive",
        "plural"
      ]
    },
    {
      "form": "ну́клеусу",
      "roman": "núkleusu",
      "source": "declension",
      "tags": [
        "dative",
        "singular"
      ]
    },
    {
      "form": "ну́клеусам",
      "roman": "núkleusam",
      "source": "declension",
      "tags": [
        "dative",
        "plural"
      ]
    },
    {
      "form": "ну́клеус",
      "roman": "núkleus",
      "source": "declension",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "ну́клеусы",
      "roman": "núkleusy",
      "source": "declension",
      "tags": [
        "accusative",
        "plural"
      ]
    },
    {
      "form": "ну́клеусом",
      "roman": "núkleusom",
      "source": "declension",
      "tags": [
        "instrumental",
        "singular"
      ]
    },
    {
      "form": "ну́клеусами",
      "roman": "núkleusami",
      "source": "declension",
      "tags": [
        "instrumental",
        "plural"
      ]
    },
    {
      "form": "ну́клеусе",
      "roman": "núkleuse",
      "source": "declension",
      "tags": [
        "prepositional",
        "singular"
      ]
    },
    {
      "form": "ну́клеусах",
      "roman": "núkleusax",
      "source": "declension",
      "tags": [
        "plural",
        "prepositional"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ну́клеус"
      },
      "expansion": "ну́клеус • (núkleus) m inan (genitive ну́клеуса, nominative plural ну́клеусы, genitive plural ну́клеусов)",
      "name": "ru-noun+"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Russian nouns with accent pattern a",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "roman": "nuklearnyj",
          "word": "нуклеарный"
        }
      ],
      "glosses": [
        "nucleus"
      ],
      "id": "en-нуклеус-ru-noun-uTPvbx-M",
      "links": [
        [
          "nucleus",
          "nucleus"
        ]
      ],
      "related": [
        {
          "roman": "jadró",
          "word": "ядро́"
        },
        {
          "roman": "jádernyj",
          "word": "я́дерный"
        },
        {
          "roman": "átomnyj",
          "word": "а́томный"
        }
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈnuklʲɪʊs]"
    }
  ],
  "word": "нуклеус"
}

{
  "derived": [
    {
      "roman": "nuklearnyj",
      "word": "нуклеарный"
    }
  ],
  "forms": [
    {
      "form": "ну́клеус",
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "núkleus",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "ну́клеуса",
      "tags": [
        "genitive"
      ]
    },
    {
      "form": "ну́клеусы",
      "tags": [
        "nominative",
        "plural"
      ]
    },
    {
      "form": "ну́клеусов",
      "tags": [
        "genitive",
        "plural"
      ]
    },
    {
      "form": "no-table-tags",
      "source": "declension",
      "tags": [
        "table-tags"
      ]
    },
    {
      "form": "ru-noun-table",
      "source": "declension",
      "tags": [
        "inflection-template"
      ]
    },
    {
      "form": "hard-stem",
      "source": "declension",
      "tags": [
        "class"
      ]
    },
    {
      "form": "accent-a",
      "source": "declension",
      "tags": [
        "class"
      ]
    },
    {
      "form": "ну́клеус",
      "roman": "núkleus",
      "source": "declension",
      "tags": [
        "nominative",
        "singular"
      ]
    },
    {
      "form": "ну́клеусы",
      "roman": "núkleusy",
      "source": "declension",
      "tags": [
        "nominative",
        "plural"
      ]
    },
    {
      "form": "ну́клеуса",
      "roman": "núkleusa",
      "source": "declension",
      "tags": [
        "genitive",
        "singular"
      ]
    },
    {
      "form": "ну́клеусов",
      "roman": "núkleusov",
      "source": "declension",
      "tags": [
        "genitive",
        "plural"
      ]
    },
    {
      "form": "ну́клеусу",
      "roman": "núkleusu",
      "source": "declension",
      "tags": [
        "dative",
        "singular"
      ]
    },
    {
      "form": "ну́клеусам",
      "roman": "núkleusam",
      "source": "declension",
      "tags": [
        "dative",
        "plural"
      ]
    },
    {
      "form": "ну́клеус",
      "roman": "núkleus",
      "source": "declension",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "ну́клеусы",
      "roman": "núkleusy",
      "source": "declension",
      "tags": [
        "accusative",
        "plural"
      ]
    },
    {
      "form": "ну́клеусом",
      "roman": "núkleusom",
      "source": "declension",
      "tags": [
        "instrumental",
        "singular"
      ]
    },
    {
      "form": "ну́клеусами",
      "roman": "núkleusami",
      "source": "declension",
      "tags": [
        "instrumental",
        "plural"
      ]
    },
    {
      "form": "ну́клеусе",
      "roman": "núkleuse",
      "source": "declension",
      "tags": [
        "prepositional",
        "singular"
      ]
    },
    {
      "form": "ну́клеусах",
      "roman": "núkleusax",
      "source": "declension",
      "tags": [
        "plural",
        "prepositional"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "ну́клеус"
      },
      "expansion": "ну́клеус • (núkleus) m inan (genitive ну́клеуса, nominative plural ну́клеусы, genitive plural ну́клеусов)",
      "name": "ru-noun+"
    }
  ],
  "lang": "Russian",
  "lang_code": "ru",
  "pos": "noun",
  "related": [
    {
      "roman": "jadró",
      "word": "ядро́"
    },
    {
      "roman": "jádernyj",
      "word": "я́дерный"
    },
    {
      "roman": "átomnyj",
      "word": "а́томный"
    }
  ],
  "senses": [
    {
      "categories": [
        "Pages with 2 entries",
        "Russian 3-syllable words",
        "Russian entries with incorrect language header",
        "Russian hard-stem masculine-form accent-a nouns",
        "Russian hard-stem masculine-form nouns",
        "Russian inanimate nouns",
        "Russian lemmas",
        "Russian links with redundant wikilinks",
        "Russian masculine nouns",
        "Russian nouns",
        "Russian nouns with accent pattern a",
        "Russian terms with IPA pronunciation"
      ],
      "glosses": [
        "nucleus"
      ],
      "links": [
        [
          "nucleus",
          "nucleus"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈnuklʲɪʊs]"
    }
  ],
  "word": "нуклеус"
}