"mésomère" meaning in French

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "méso-",
        "3": "-mère"
      },
      "expansion": "méso- + -mère",
      "name": "af"
    }
  ],
  "etymology_text": "From méso- + -mère.",
  "forms": [
    {
      "form": "mésomères",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mésomère (plural mésomères)",
      "name": "fr-adj"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French terms prefixed with méso-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "French terms suffixed with -mère",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Chemistry",
          "orig": "fr:Chemistry",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "mesomeric"
      ],
      "id": "en-mésomère-fr-adj-e0HsrTEo",
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "mesomeric",
          "mesomeric"
        ]
      ],
      "raw_glosses": [
        "(chemistry) mesomeric"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "mésomère"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "fr",
        "2": "méso-",
        "3": "-mère"
      },
      "expansion": "méso- + -mère",
      "name": "af"
    }
  ],
  "etymology_text": "From méso- + -mère.",
  "forms": [
    {
      "form": "mésomères",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mésomère (plural mésomères)",
      "name": "fr-adj"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "French adjectives",
        "French entries with incorrect language header",
        "French lemmas",
        "French terms prefixed with méso-",
        "French terms suffixed with -mère",
        "fr:Chemistry"
      ],
      "glosses": [
        "mesomeric"
      ],
      "links": [
        [
          "chemistry",
          "chemistry"
        ],
        [
          "mesomeric",
          "mesomeric"
        ]
      ],
      "raw_glosses": [
        "(chemistry) mesomeric"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "mésomère"
}