pallium
A large cloak worn by Greek philosophers and teachers.
historical
A woolen liturgical vestment resembling a collar and worn over the chasuble in the Western Christian liturgical tradition, conferred on archbishops by the Pope, equivalent to the Eastern Christian omophorion.
Tut, tut, I have absolved thee: dost thou scorn me, / Because I had my Canterbury pallium / From one whom they dispoped?
The mantle of a mollusc.
The cerebral cortex.
Where it comes from
Borrowed from Latin pallium (“a cloak”). Doublet of pall.
Adapted from the Wiktionary entry pallium (CC BY-SA 4.0).