"G³" meaning in English

{
  "etymology_text": "G, the initial letter of each of the component words of the noun phrase + ³, representing the alliterative tripling of the g initials.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "G³ (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "gadolinium gallium garnet"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Electronics",
          "orig": "en:Electronics",
          "parents": [
            "Technology",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Abbreviation of gadolinium gallium garnet."
      ],
      "id": "en-G³-en-noun-e0xxEBCZ",
      "links": [
        [
          "electronics",
          "electronics"
        ],
        [
          "gadolinium gallium garnet",
          "gadolinium gallium garnet#English"
        ]
      ],
      "raw_glosses": [
        "(electronics) Abbreviation of gadolinium gallium garnet."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "uncountable"
      ],
      "topics": [
        "business",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "electronics",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "G³"
}

{
  "etymology_text": "G, the initial letter of each of the component words of the noun phrase + ³, representing the alliterative tripling of the g initials.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "G³ (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "gadolinium gallium garnet"
        }
      ],
      "categories": [
        "English abbreviations",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms spelled with ³",
        "English uncountable nouns",
        "English words without vowels",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Electronics"
      ],
      "glosses": [
        "Abbreviation of gadolinium gallium garnet."
      ],
      "links": [
        [
          "electronics",
          "electronics"
        ],
        [
          "gadolinium gallium garnet",
          "gadolinium gallium garnet#English"
        ]
      ],
      "raw_glosses": [
        "(electronics) Abbreviation of gadolinium gallium garnet."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "uncountable"
      ],
      "topics": [
        "business",
        "electrical-engineering",
        "electricity",
        "electromagnetism",
        "electronics",
        "energy",
        "engineering",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "G³"
}