"meso-" meaning in Translingual

{
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "grc",
        "3": "μέσος",
        "4": "",
        "5": "middle"
      },
      "expansion": "Ancient Greek μέσος (mésos, “middle”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μέσος (mésos, “middle”).",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "prefix"
      },
      "expansion": "meso-",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "prefix",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Translingual entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Biology",
          "orig": "mul:Biology",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "mul",
          "name": "Taxonomy",
          "orig": "mul:Taxonomy",
          "parents": [
            "Biology",
            "Evolutionary theory",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "Mesocricetus"
        }
      ],
      "glosses": [
        "Intermediate in size or other characteristic."
      ],
      "id": "en-meso--mul-prefix-hMwvT9o9",
      "links": [
        [
          "taxonomy",
          "taxonomy"
        ],
        [
          "biology",
          "biology"
        ]
      ],
      "raw_glosses": [
        "(taxonomy, biology) Intermediate in size or other characteristic."
      ],
      "related": [
        {
          "word": "Canis mesomelas"
        },
        {
          "word": "Mesembryanthemum"
        }
      ],
      "tags": [
        "morpheme"
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "taxonomy"
      ]
    }
  ],
  "word": "meso-"
}

{
  "derived": [
    {
      "word": "Mesocricetus"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "mul",
        "2": "grc",
        "3": "μέσος",
        "4": "",
        "5": "middle"
      },
      "expansion": "Ancient Greek μέσος (mésos, “middle”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μέσος (mésos, “middle”).",
  "head_templates": [
    {
      "args": {
        "1": "mul",
        "2": "prefix"
      },
      "expansion": "meso-",
      "name": "head"
    }
  ],
  "lang": "Translingual",
  "lang_code": "mul",
  "pos": "prefix",
  "related": [
    {
      "word": "Canis mesomelas"
    },
    {
      "word": "Mesembryanthemum"
    }
  ],
  "senses": [
    {
      "categories": [
        "Translingual entries with incorrect language header",
        "Translingual lemmas",
        "Translingual prefixes",
        "Translingual terms derived from Ancient Greek",
        "mul:Biology",
        "mul:Taxonomy"
      ],
      "glosses": [
        "Intermediate in size or other characteristic."
      ],
      "links": [
        [
          "taxonomy",
          "taxonomy"
        ],
        [
          "biology",
          "biology"
        ]
      ],
      "raw_glosses": [
        "(taxonomy, biology) Intermediate in size or other characteristic."
      ],
      "tags": [
        "morpheme"
      ],
      "topics": [
        "biology",
        "natural-sciences",
        "taxonomy"
      ]
    }
  ],
  "word": "meso-"
}