"glacial maximum" meaning in English

{
  "forms": [
    {
      "form": "glacial maxima",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "glacial maximums",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "glacial maxima",
        "2": "s"
      },
      "expansion": "glacial maximum (plural glacial maxima or glacial maximums)",
      "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": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "LGM"
        }
      ],
      "examples": [
        {
          "text": "The last glacial maximum is estimated to have occurred between 26,000 and 20,000 years ago.",
          "type": "example"
        }
      ],
      "glosses": [
        "The point during a glacial period when the ice sheets are at their greatest extent."
      ],
      "id": "en-glacial_maximum-en-noun-0z5AfgFC",
      "links": [
        [
          "glacial period",
          "glacial period"
        ],
        [
          "ice sheet",
          "ice sheet"
        ]
      ]
    }
  ],
  "word": "glacial maximum"
}

{
  "derived": [
    {
      "word": "LGM"
    }
  ],
  "forms": [
    {
      "form": "glacial maxima",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "glacial maximums",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "glacial maxima",
        "2": "s"
      },
      "expansion": "glacial maximum (plural glacial maxima or glacial maximums)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "text": "The last glacial maximum is estimated to have occurred between 26,000 and 20,000 years ago.",
          "type": "example"
        }
      ],
      "glosses": [
        "The point during a glacial period when the ice sheets are at their greatest extent."
      ],
      "links": [
        [
          "glacial period",
          "glacial period"
        ],
        [
          "ice sheet",
          "ice sheet"
        ]
      ]
    }
  ],
  "word": "glacial maximum"
}