A Skull

1. (anatomy) The main bones of the head considered as a unit; including the cranium, facial bones, and mandible. Skull - Wikipedia
2. A symbol for death; death's-head
3. (figuratively) The mind or brain.
4. A crust formed on the ladle, etc. by the partial cooling of molten metal.
5. The crown of the headpiece in armour.
6. (Scotland) A shallow bow-handled basket.

Synonyms

• brainpan
• harnpan