"plstc." meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "alt_of": [
        {
          "word": "plastic"
        }
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          "source": "w"
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      "glosses": [
        "Abbreviation of plastic."
      ],
      "id": "en-plstc.-en-noun-kwcrg-AK",
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          "plastic",
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  "word": "plstc."
}

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      "expansion": "plstc.",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        {
          "word": "plastic"
        }
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        "English countable nouns",
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        "English lemmas",
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      ],
      "glosses": [
        "Abbreviation of plastic."
      ],
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  "word": "plstc."
}