"2SLS" meaning in English

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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "two-stage least squares"
        }
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          "name": "Statistics",
          "orig": "en:Statistics",
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      "glosses": [
        "Initialism of two-stage least squares."
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      "id": "en-2SLS-en-noun-1Dfi-vO0",
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          "statistics",
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        [
          "two-stage least squares",
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      "raw_glosses": [
        "(statistics) Initialism of two-stage least squares."
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      "synonyms": [
        {
          "word": "TSLS"
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      "topics": [
        "mathematics",
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    }
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  "word": "2SLS"
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      "expansion": "2SLS (uncountable)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "two-stage least squares"
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        "Initialism of two-stage least squares."
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          "two-stage least squares",
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        "(statistics) Initialism of two-stage least squares."
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      "topics": [
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  "synonyms": [
    {
      "word": "TSLS"
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  ],
  "word": "2SLS"
}