nounpl. pal·li·ums or pal·li·a
- A cloak or mantle worn by the ancient Greeks and Romans.
- Ecclesiastical A vestment worn by the pope and conferred by him on archbishops. Also called pall1.
- a. The mantle of gray matter forming the cerebral cortex.b. The mantle of a mollusk or a brachiopod.
Origin of palliumLatin.
(plural pallia or palliums)
From Latin pallium (â€œa cloakâ€).