"cranial capacity" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Compositions en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Locutions nominales en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de cranial et de capacity."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "cranium"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Exemples en anglais",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Exemples en anglais à traduire",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Lexique en anglais de l’anatomie",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "Poul Anderson, Trader to the stars, 1964",
          "text": "Those huge jaws must demand corresponding maxillary muscles, attaching to a ring on top of the skull. Which’d restrict the cranial capacity."
        }
      ],
      "glosses": [
        "Capacité crânienne."
      ],
      "id": "fr-cranial_capacity-en-noun-219rZOCz",
      "topics": [
        "anatomy"
      ]
    }
  ],
  "word": "cranial capacity"
}

{
  "categories": [
    "Compositions en anglais",
    "Locutions nominales en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Composé de cranial et de capacity."
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "cranium"
    }
  ],
  "senses": [
    {
      "categories": [
        "Exemples en anglais",
        "Exemples en anglais à traduire",
        "Lexique en anglais de l’anatomie"
      ],
      "examples": [
        {
          "ref": "Poul Anderson, Trader to the stars, 1964",
          "text": "Those huge jaws must demand corresponding maxillary muscles, attaching to a ring on top of the skull. Which’d restrict the cranial capacity."
        }
      ],
      "glosses": [
        "Capacité crânienne."
      ],
      "topics": [
        "anatomy"
      ]
    }
  ],
  "word": "cranial capacity"
}