"digamma function" meaning in English

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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "The first of the polygamma functions, being the logarithmic derivative of the gamma function."
      ],
      "id": "en-digamma_function-en-noun-m8Mg3QIX",
      "links": [
        [
          "mathematics",
          "mathematics"
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        [
          "polygamma function",
          "polygamma function"
        ],
        [
          "logarithmic",
          "logarithmic"
        ],
        [
          "derivative",
          "derivative"
        ],
        [
          "gamma function",
          "gamma function"
        ]
      ],
      "raw_glosses": [
        "(mathematics) The first of the polygamma functions, being the logarithmic derivative of the gamma function."
      ],
      "topics": [
        "mathematics",
        "sciences"
      ],
      "wikipedia": [
        "digamma function"
      ]
    }
  ],
  "sounds": [
    {
      "rhymes": "-ʌŋkʃən"
    }
  ],
  "word": "digamma function"
}

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        "The first of the polygamma functions, being the logarithmic derivative of the gamma function."
      ],
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          "mathematics",
          "mathematics"
        ],
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          "polygamma function",
          "polygamma function"
        ],
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          "logarithmic",
          "logarithmic"
        ],
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          "derivative",
          "derivative"
        ],
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          "gamma function",
          "gamma function"
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        "(mathematics) The first of the polygamma functions, being the logarithmic derivative of the gamma function."
      ],
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        "mathematics",
        "sciences"
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      "rhymes": "-ʌŋkʃən"
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