"núcleo" meaning in Spanish

{
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "la",
        "3": "nū̆cleus",
        "4": "",
        "5": "kernel, core"
      },
      "expansion": "Borrowed from Latin nū̆cleus (“kernel, core”)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Latin nū̆cleus (“kernel, core”).",
  "forms": [
    {
      "form": "núcleos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "núcleo m (plural núcleos)",
      "name": "es-noun"
    }
  ],
  "hyphenation": [
    "nú‧cle‧o"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Pages with 3 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "fusión de núcleo"
        },
        {
          "word": "nuclear"
        },
        {
          "word": "nucleario"
        },
        {
          "word": "núcleo atómico"
        },
        {
          "word": "núcleo caudado"
        },
        {
          "word": "núcleo duro"
        },
        {
          "word": "núcleo familiar"
        }
      ],
      "glosses": [
        "nucleus"
      ],
      "id": "en-núcleo-es-noun-uTPvbx-M",
      "links": [
        [
          "nucleus",
          "nucleus"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈnukleo/"
    },
    {
      "ipa": "[ˈnu.kle.o]"
    },
    {
      "rhymes": "-ukleo"
    }
  ],
  "word": "núcleo"
}

{
  "derived": [
    {
      "word": "fusión de núcleo"
    },
    {
      "word": "nuclear"
    },
    {
      "word": "nucleario"
    },
    {
      "word": "núcleo atómico"
    },
    {
      "word": "núcleo caudado"
    },
    {
      "word": "núcleo duro"
    },
    {
      "word": "núcleo familiar"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "es",
        "2": "la",
        "3": "nū̆cleus",
        "4": "",
        "5": "kernel, core"
      },
      "expansion": "Borrowed from Latin nū̆cleus (“kernel, core”)",
      "name": "bor+"
    }
  ],
  "etymology_text": "Borrowed from Latin nū̆cleus (“kernel, core”).",
  "forms": [
    {
      "form": "núcleos",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "m"
      },
      "expansion": "núcleo m (plural núcleos)",
      "name": "es-noun"
    }
  ],
  "hyphenation": [
    "nú‧cle‧o"
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Pages with 3 entries",
        "Pages with entries",
        "Rhymes:Spanish/ukleo",
        "Rhymes:Spanish/ukleo/3 syllables",
        "Spanish 3-syllable words",
        "Spanish countable nouns",
        "Spanish entries with incorrect language header",
        "Spanish lemmas",
        "Spanish masculine nouns",
        "Spanish nouns",
        "Spanish terms borrowed from Latin",
        "Spanish terms derived from Latin",
        "Spanish terms with IPA pronunciation"
      ],
      "glosses": [
        "nucleus"
      ],
      "links": [
        [
          "nucleus",
          "nucleus"
        ]
      ],
      "tags": [
        "masculine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˈnukleo/"
    },
    {
      "ipa": "[ˈnu.kle.o]"
    },
    {
      "rhymes": "-ukleo"
    }
  ],
  "word": "núcleo"
}