"PAAc" meaning in English

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      "expansion": "PAAc",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "polyacrylic acid"
        }
      ],
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          "name": "English entries with incorrect language header",
          "parents": [
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          "kind": "topical",
          "langcode": "en",
          "name": "Organic compounds",
          "orig": "en:Organic compounds",
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            "Chemistry",
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        }
      ],
      "glosses": [
        "Initialism of polyacrylic acid."
      ],
      "id": "en-PAAc-en-noun-dgEoR5wh",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "polyacrylic acid",
          "polyacrylic acid#English"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) Initialism of polyacrylic acid."
      ],
      "synonyms": [
        {
          "word": "PAA"
        }
      ],
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        "abbreviation",
        "alt-of",
        "initialism"
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      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
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    }
  ],
  "word": "PAAc"
}

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      "expansion": "PAAc",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "polyacrylic acid"
        }
      ],
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English initialisms",
        "English lemmas",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "en:Organic compounds"
      ],
      "glosses": [
        "Initialism of polyacrylic acid."
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "polyacrylic acid",
          "polyacrylic acid#English"
        ]
      ],
      "raw_glosses": [
        "(organic chemistry) Initialism of polyacrylic acid."
      ],
      "synonyms": [
        {
          "word": "PAA"
        }
      ],
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        "abbreviation",
        "alt-of",
        "initialism"
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      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "PAAc"
}