What is the X in X-mas?
pallium pal·li·um (pāl'ē-əm)
n. pl. pal·li·ums or pal·li·a (-lē-ə)
The mantle of gray matter with the underlying white substance. Also called brain mantle, mantle.
liturgical vestment worn over the chasuble by the pope, archbishops, and some bishops in the Roman Catholic church. It is bestowed by the pope on archbishops and bishops having metropolitan jurisdiction as a symbol of their participation in papal authority. It is made of a circular strip of white lamb's wool about two inches wide and is placed over the shoulders. Two vertical bands, extending from the circular strip in the front and back, give the pallium a Y-shaped appearance. Six crosses, one each on the chest and back and on each shoulder and band, adorn the vestment.