"evolvent" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "ēvolvēns"
      },
      "expansion": "Latin ēvolvēns",
      "name": "uder"
    }
  ],
  "etymology_text": "Latin ēvolvēns, ēvolventis (“unrolling”), present participle of ēvolvō (“I unroll”).",
  "forms": [
    {
      "form": "evolvents",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "evolvent (plural evolvents)",
      "name": "en-noun"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
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          "source": "w"
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          "name": "Pages with 2 entries",
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Geometry",
          "orig": "en:Geometry",
          "parents": [
            "Mathematics",
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
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        }
      ],
      "glosses": [
        "The involute of a curve."
      ],
      "id": "en-evolvent-en-noun-XHcPgQJZ",
      "links": [
        [
          "geometry",
          "geometry"
        ],
        [
          "involute",
          "involute"
        ],
        [
          "curve",
          "curve"
        ]
      ],
      "raw_glosses": [
        "(geometry) The involute of a curve."
      ],
      "related": [
        {
          "word": "evolute"
        }
      ],
      "topics": [
        "geometry",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "evolvent"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "ēvolvēns"
      },
      "expansion": "Latin ēvolvēns",
      "name": "uder"
    }
  ],
  "etymology_text": "Latin ēvolvēns, ēvolventis (“unrolling”), present participle of ēvolvō (“I unroll”).",
  "forms": [
    {
      "form": "evolvents",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "evolvent (plural evolvents)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "evolute"
    }
  ],
  "senses": [
    {
      "categories": [
        "English countable nouns",
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      "glosses": [
        "The involute of a curve."
      ],
      "links": [
        [
          "geometry",
          "geometry"
        ],
        [
          "involute",
          "involute"
        ],
        [
          "curve",
          "curve"
        ]
      ],
      "raw_glosses": [
        "(geometry) The involute of a curve."
      ],
      "topics": [
        "geometry",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "evolvent"
}