"arccos" meaning in English

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      "expansion": "arc- + cos",
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  "etymology_text": "From arc- + cos.",
  "forms": [
    {
      "form": "arccoses",
      "tags": [
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  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "word": "arccosine"
        }
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      "examples": [
        {
          "text": "arccos (1/2ϕ)=2π/5"
        },
        {
          "ref": "1973, The Soviet Economy in Regional Perspective, Praeger Publishers, page 3:",
          "text": "[…]with the appropriate constraint angles measured in terms of the arccoses and arctans.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Abbreviation of arccosine."
      ],
      "id": "en-arccos-en-noun-MxlN3RaC",
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      "related": [
        {
          "word": "arcsin"
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        {
          "word": "arctan"
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  "word": "arccos"
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        "2": "arc",
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      "expansion": "arc- + cos",
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    }
  ],
  "etymology_text": "From arc- + cos.",
  "forms": [
    {
      "form": "arccoses",
      "tags": [
        "plural"
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  ],
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  "pos": "noun",
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    {
      "word": "arcsin"
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      "word": "arctan"
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        {
          "text": "arccos (1/2ϕ)=2π/5"
        },
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          "text": "[…]with the appropriate constraint angles measured in terms of the arccoses and arctans.",
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        }
      ],
      "glosses": [
        "Abbreviation of arccosine."
      ],
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  "word": "arccos"
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