pallium

(historical) A large cloak worn by Greek philosophers and teachers.

(Christianity) 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.

(malacology) The mantle of a mollusc.

(anatomy) The cerebral cortex.

(obsolete, meteorology) A sheet of cloud covering the whole sky, especially nimbostratus.