pallium

(pălˈē-əm)

1. A cloak or mantle worn by the ancient Greeks and Romans.
2. Ecclesiastical A vestment worn by the pope and conferred by him on archbishops and sometimes on bishops. Also called pall¹.
3. a. The mantle of gray matter forming the cerebral cortex.
   b. The mantle of a mollusk, brachiopod, or bird.