"2DM" meaning in English

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      "form": "2DMs",
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      "expansion": "2DM (plural 2DMs)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "two-dimensional material"
        }
      ],
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          "langcode": "en",
          "name": "Engineering",
          "orig": "en:Engineering",
          "parents": [
            "Applied sciences",
            "Technology",
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            "Fundamental"
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      ],
      "glosses": [
        "Abbreviation of two-dimensional material."
      ],
      "id": "en-2DM-en-noun-BBAONrpa",
      "links": [
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          "engineering",
          "engineering#Noun"
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          "two-dimensional material",
          "two-dimensional material#English"
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      "raw_glosses": [
        "(engineering) Abbreviation of two-dimensional material."
      ],
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      "topics": [
        "engineering",
        "natural-sciences",
        "physical-sciences"
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    }
  ],
  "word": "2DM"
}

{
  "forms": [
    {
      "form": "2DMs",
      "tags": [
        "plural"
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    }
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      "expansion": "2DM (plural 2DMs)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "two-dimensional material"
        }
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      "glosses": [
        "Abbreviation of two-dimensional material."
      ],
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          "engineering#Noun"
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          "two-dimensional material#English"
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      "raw_glosses": [
        "(engineering) Abbreviation of two-dimensional material."
      ],
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      "topics": [
        "engineering",
        "natural-sciences",
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  "word": "2DM"
}