"covector" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "co",
        "3": "vector"
      },
      "expansion": "co- + vector",
      "name": "prefix"
    }
  ],
  "etymology_text": "From co- + vector.",
  "forms": [
    {
      "form": "covectors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "covector (plural covectors)",
      "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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          "source": "w"
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Mathematics",
          "orig": "en:Mathematics",
          "parents": [
            "Formal sciences",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A linear map from a vector space to its field of scalars"
      ],
      "id": "en-covector-en-noun-pQVDg5ZN",
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "linear",
          "linear"
        ],
        [
          "map",
          "map"
        ],
        [
          "vector space",
          "vector space"
        ],
        [
          "field",
          "field"
        ],
        [
          "scalar",
          "scalar"
        ]
      ],
      "raw_glosses": [
        "(mathematics) A linear map from a vector space to its field of scalars"
      ],
      "synonyms": [
        {
          "word": "linear functional"
        }
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "word": "covector"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "co",
        "3": "vector"
      },
      "expansion": "co- + vector",
      "name": "prefix"
    }
  ],
  "etymology_text": "From co- + vector.",
  "forms": [
    {
      "form": "covectors",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "covector (plural covectors)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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      "glosses": [
        "A linear map from a vector space to its field of scalars"
      ],
      "links": [
        [
          "mathematics",
          "mathematics"
        ],
        [
          "linear",
          "linear"
        ],
        [
          "map",
          "map"
        ],
        [
          "vector space",
          "vector space"
        ],
        [
          "field",
          "field"
        ],
        [
          "scalar",
          "scalar"
        ]
      ],
      "raw_glosses": [
        "(mathematics) A linear map from a vector space to its field of scalars"
      ],
      "topics": [
        "mathematics",
        "sciences"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "linear functional"
    }
  ],
  "word": "covector"
}