IPA: /ˌkreɪniəʊˈsɛrɪbrəl/
KK: /ˌkreɪniəʊsəˈrɛbrəl/
Relating to both the skull and the brain.
The doctor explained the craniocerebral injury sustained in the accident.
Craniocerebral is formed from "cranium" (from Latin *cranium*, meaning skull) and "cerebrum" (from Latin *cerebrum*, meaning brain). The word refers to matters relating to both the skull and the brain.
Think of the 'skull' ('cranium') and the 'brain' ('cerebrum') together — that's what craniocerebral means, relating to both.