"CTLD" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "C-type lectin-like domain"
        }
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          "parents": [
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          "source": "w"
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          "source": "w"
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          "parents": [],
          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Biology",
          "orig": "en:Biology",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
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          "source": "w"
        }
      ],
      "glosses": [
        "Initialism of C-type lectin-like domain."
      ],
      "id": "en-CTLD-en-noun-bsQs0z0U",
      "links": [
        [
          "biology",
          "biology"
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          "C-type lectin-like domain",
          "C-type lectin-like domain#English"
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      "raw_glosses": [
        "(biology) Initialism of C-type lectin-like domain."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
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      "topics": [
        "biology",
        "natural-sciences"
      ]
    }
  ],
  "word": "CTLD"
}

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      "expansion": "CTLD",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "C-type lectin-like domain"
        }
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        "English countable nouns",
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        "en:Biology"
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        "Initialism of C-type lectin-like domain."
      ],
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        [
          "biology",
          "biology"
        ],
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          "C-type lectin-like domain",
          "C-type lectin-like domain#English"
        ]
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      "raw_glosses": [
        "(biology) Initialism of C-type lectin-like domain."
      ],
      "tags": [
        "abbreviation",
        "alt-of",
        "initialism"
      ],
      "topics": [
        "biology",
        "natural-sciences"
      ]
    }
  ],
  "word": "CTLD"
}