1. The skull of an animal.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• crainium,
• cadnium,
• prenium,
• craniumm,
• cromium,
• chronium,
• carnium,
• uraniam,
• craniao,
• urainium,
• cranite,
• cronism,
• acranim,
• caranimum,
• craninum,
• uranim,
• arcanium,
• arcannum,
• canagnium,
• cardium

• crowning,
• geranium,
• crewman,
• uranium,
• crooning.

The adjective form of the word "cranium" is "cranial".