"logarithmic integral" meaning in English

{
  "forms": [
    {
      "form": "logarithmic integrals",
      "tags": [
        "plural"
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      "args": {},
      "expansion": "logarithmic integral (plural logarithmic integrals)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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      ],
      "glosses": [
        "A special function written using the symbol li and defined as operatorname lix=∫₀ˣ(dt)/(ln t)."
      ],
      "id": "en-logarithmic_integral-en-noun-JloxxFzq",
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          "li",
          "li#Translingual"
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      "raw_glosses": [
        "(mathematics) A special function written using the symbol li and defined as operatorname lix=∫₀ˣ(dt)/(ln t)."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "logarithmic integral"
      ]
    }
  ],
  "word": "logarithmic integral"
}

{
  "forms": [
    {
      "form": "logarithmic integrals",
      "tags": [
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  ],
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      "expansion": "logarithmic integral (plural logarithmic integrals)",
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  "lang_code": "en",
  "pos": "noun",
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        "A special function written using the symbol li and defined as operatorname lix=∫₀ˣ(dt)/(ln t)."
      ],
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        "(mathematics) A special function written using the symbol li and defined as operatorname lix=∫₀ˣ(dt)/(ln t)."
      ],
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        "mathematics",
        "sciences"
      ],
      "wikipedia": [
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  "word": "logarithmic integral"
}