Wordnet 3.0
ADJECTIVE (1)
1.
within the skull;
The Collaborative International Dictionary of English v.0.48:
Intracranial \In`tra*cra"ni*al\, a.
Within the cranium or skull. --Sir W. Hamilton.
[1913 Webster]
WordNet (r) 3.0 (2006):
intracranial
adj 1: within the skull