"superheavy element" meaning in English

{
  "forms": [
    {
      "form": "superheavy elements",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "superheavy element (plural superheavy elements)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Radioactivity",
          "orig": "en:Radioactivity",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Types of chemical element",
          "orig": "en:Types of chemical element",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "A chemical element with an extremely high atomic number; typically taken to mean beyond lawrencium (element 103, the last actinide)"
      ],
      "id": "en-superheavy_element-en-noun-aPZfYHuN",
      "links": [
        [
          "chemical element",
          "chemical element"
        ],
        [
          "atomic number",
          "atomic number"
        ],
        [
          "lawrencium",
          "lawrencium"
        ],
        [
          "actinide",
          "actinide"
        ]
      ],
      "wikipedia": [
        "superheavy element"
      ]
    }
  ],
  "word": "superheavy element"
}

{
  "forms": [
    {
      "form": "superheavy elements",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "superheavy element (plural superheavy elements)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Radioactivity",
        "en:Types of chemical element"
      ],
      "glosses": [
        "A chemical element with an extremely high atomic number; typically taken to mean beyond lawrencium (element 103, the last actinide)"
      ],
      "links": [
        [
          "chemical element",
          "chemical element"
        ],
        [
          "atomic number",
          "atomic number"
        ],
        [
          "lawrencium",
          "lawrencium"
        ],
        [
          "actinide",
          "actinide"
        ]
      ],
      "wikipedia": [
        "superheavy element"
      ]
    }
  ],
  "word": "superheavy element"
}