pallium

noun

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

   “Tut, tut, I have absolved thee: dost thou scorn me, / Because I had my Canterbury pallium / From one whom they dispoped?”

   “Gregory sent Augustine a special liturgical stole, the pallium, a piece of official ecclesiastical dress borrowed from the garments worn by imperial officials.”

   “Wynfrith, an Anglo-Saxon monk later known as St Boniface, who was the first archbishop of Mainz and a key figure in the Empire's church history, was given cloth that had lain across St Peter's tomb as his pallium in 752.”

3. The mantle of a mollusc.
4. The cerebral cortex.
5. A presumed gelatinous envelope of diatoms.
6. (obsolete)A sheet of cloud covering the whole sky, especially nimbostratus.