A Pallium

1. (historical) A large cloak worn by Greek philosophers and teachers. [from 10th c.]
2. (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. [from 11th c.]
3. (malacology) The mantle of a mollusc. [from 19th c.]
4. (anatomy) The cerebral cortex. [from 19th c.] Pallium (neuroanatomy) - Wikipedia
5. (obsolete, meteorology) A sheet of cloud covering the whole sky, especially nimbostratus. [19th c.]