"main group element" meaning in English

{
  "forms": [
    {
      "form": "main group elements",
      "tags": [
        "plural"
      ]
    }
  ],
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    {
      "args": {
        "head": "main group element"
      },
      "expansion": "main group element (plural main group elements)",
      "name": "en-noun"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [],
          "source": "w"
        },
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        {
          "kind": "other",
          "langcode": "en",
          "name": "Inorganic chemistry",
          "orig": "en:Inorganic chemistry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Physics",
          "orig": "en:Physics",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "langcode": "en",
          "name": "Types of chemical element",
          "orig": "en:Types of chemical element",
          "parents": [],
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        }
      ],
      "glosses": [
        "Any chemical element from the main group."
      ],
      "id": "en-main_group_element-en-noun-GJOJT2vt",
      "links": [
        [
          "inorganic chemistry",
          "inorganic chemistry"
        ],
        [
          "physics",
          "physics"
        ],
        [
          "chemical",
          "chemical"
        ],
        [
          "main group",
          "main group"
        ]
      ],
      "raw_glosses": [
        "(inorganic chemistry, physics) Any chemical element from the main group."
      ],
      "topics": [
        "chemistry",
        "inorganic-chemistry",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "translations": [
        {
          "code": "cmn",
          "lang": "Chinese Mandarin",
          "lang_code": "cmn",
          "sense": "Any chemical element from the main group",
          "word": "主族元素"
        },
        {
          "code": "fi",
          "lang": "Finnish",
          "lang_code": "fi",
          "sense": "Any chemical element from the main group",
          "word": "pääryhmän alkuaine"
        }
      ]
    }
  ],
  "word": "main group element"
}

{
  "forms": [
    {
      "form": "main group elements",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
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      "expansion": "main group element (plural main group elements)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "Terms with Finnish translations",
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        "en:Inorganic chemistry",
        "en:Physics",
        "en:Types of chemical element"
      ],
      "glosses": [
        "Any chemical element from the main group."
      ],
      "links": [
        [
          "inorganic chemistry",
          "inorganic chemistry"
        ],
        [
          "physics",
          "physics"
        ],
        [
          "chemical",
          "chemical"
        ],
        [
          "main group",
          "main group"
        ]
      ],
      "raw_glosses": [
        "(inorganic chemistry, physics) Any chemical element from the main group."
      ],
      "topics": [
        "chemistry",
        "inorganic-chemistry",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "translations": [
    {
      "code": "cmn",
      "lang": "Chinese Mandarin",
      "lang_code": "cmn",
      "sense": "Any chemical element from the main group",
      "word": "主族元素"
    },
    {
      "code": "fi",
      "lang": "Finnish",
      "lang_code": "fi",
      "sense": "Any chemical element from the main group",
      "word": "pääryhmän alkuaine"
    }
  ],
  "word": "main group element"
}