"megamammal" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mega",
        "3": "mammal"
      },
      "expansion": "mega- + mammal",
      "name": "prefix"
    }
  ],
  "etymology_text": "From mega- + mammal.",
  "forms": [
    {
      "form": "megamammals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "megamammal (plural megamammals)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms prefixed with mega-",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "2018, Tim Flannery, Europe: The First 100 Million Years, Penguin, published 2019, page 228:",
          "text": "In previous ice ages these factors triggered mass migrations of mega-mammals into Europe.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A very large mammal, especially an extinct one."
      ],
      "id": "en-megamammal-en-noun-1l0pJnQB",
      "links": [
        [
          "mammal",
          "mammal"
        ],
        [
          "extinct",
          "extinct"
        ]
      ]
    }
  ],
  "word": "megamammal"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "mega",
        "3": "mammal"
      },
      "expansion": "mega- + mammal",
      "name": "prefix"
    }
  ],
  "etymology_text": "From mega- + mammal.",
  "forms": [
    {
      "form": "megamammals",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "megamammal (plural megamammals)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms prefixed with mega-",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "2018, Tim Flannery, Europe: The First 100 Million Years, Penguin, published 2019, page 228:",
          "text": "In previous ice ages these factors triggered mass migrations of mega-mammals into Europe.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A very large mammal, especially an extinct one."
      ],
      "links": [
        [
          "mammal",
          "mammal"
        ],
        [
          "extinct",
          "extinct"
        ]
      ]
    }
  ],
  "word": "megamammal"
}