"GRG" meaning in All languages combined

{
  "forms": [
    {
      "form": "GRGs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "GRG (plural GRGs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "giant radio galaxy"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Black holes",
          "orig": "en:Black holes",
          "parents": [
            "Astronomy",
            "Astrophysics",
            "Gravity",
            "Relativity",
            "Sciences",
            "Space",
            "Physics",
            "Acceleration",
            "Mechanics",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of giant radio galaxy."
      ],
      "id": "en-GRG-en-noun-qLJe~28n",
      "links": [
        [
          "giant radio galaxy",
          "giant radio galaxy#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "GRG"
}

{
  "forms": [
    {
      "form": "GRGs",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "GRG (plural GRGs)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "giant radio galaxy"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "English palindromes",
        "English words without vowels",
        "en:Black holes"
      ],
      "glosses": [
        "Initialism of giant radio galaxy."
      ],
      "links": [
        [
          "giant radio galaxy",
          "giant radio galaxy#English"
        ]
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ]
    }
  ],
  "word": "GRG"
}