pallium

noun

1. 1.A large cloak worn by Greek philosophers and teachers.
2. 2.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.
3. 3.The mantle of a mollusc.
4. 4.The cerebral cortex.
5. 5.A sheet of cloud covering the whole sky, especially nimbostratus.