"maleic" meaning in English

{
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      "args": {
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      "expansion": "maleic (not comparable)",
      "name": "en-adj"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
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          "name": "English entries with incorrect language header",
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          "orig": "en:Chemistry",
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          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "maleic anhydride"
        }
      ],
      "glosses": [
        "of or relating to maleic acid or its derivatives"
      ],
      "id": "en-maleic-en-adj-QsjzlM8L",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "maleic acid",
          "maleic acid"
        ]
      ],
      "raw_glosses": [
        "(chemistry) of or relating to maleic acid or its derivatives"
      ],
      "related": [
        {
          "word": "maleinize"
        },
        {
          "word": "maleinization"
        }
      ],
      "tags": [
        "not-comparable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "maleic"
}

{
  "derived": [
    {
      "word": "maleic anhydride"
    }
  ],
  "head_templates": [
    {
      "args": {
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      },
      "expansion": "maleic (not comparable)",
      "name": "en-adj"
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "word": "maleinize"
    },
    {
      "word": "maleinization"
    }
  ],
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      "glosses": [
        "of or relating to maleic acid or its derivatives"
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "maleic acid",
          "maleic acid"
        ]
      ],
      "raw_glosses": [
        "(chemistry) of or relating to maleic acid or its derivatives"
      ],
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        "not-comparable"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
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  ],
  "word": "maleic"
}