"TMD" meaning in English

{
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "temporomandibular joint dysfunction"
        }
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        "Initialism of temporomandibular joint dysfunction."
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      "alt_of": [
        {
          "word": "traction maintenance depot"
        }
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          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
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      "glosses": [
        "Initialism of traction maintenance depot."
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        "(rail transport, UK) Initialism of traction maintenance depot."
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        "initialism",
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      "topics": [
        "rail-transport",
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  "synonyms": [
    {
      "_dis1": "0 0",
      "word": "temporomandibular joint disorder"
    },
    {
      "_dis1": "0 0",
      "word": "temporomandibular disorder"
    },
    {
      "_dis1": "0 0",
      "word": "TMJD"
    }
  ],
  "word": "TMD"
}

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  "forms": [
    {
      "form": "TMDs",
      "tags": [
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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      "glosses": [
        "Initialism of traction maintenance depot."
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        "(rail transport, UK) Initialism of traction maintenance depot."
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  "synonyms": [
    {
      "word": "temporomandibular joint disorder"
    },
    {
      "word": "temporomandibular disorder"
    },
    {
      "word": "TMJD"
    }
  ],
  "word": "TMD"
}