| n. | 1. | (Anc. Costume) A large, square, woolen cloak which enveloped the whole person, worn by the Greeks and by certain Romans. It is the Roman name of a Greek garment. |
| 2. | (R. C. Ch.) A band of white wool, worn on the shoulders, with four purple crosses worked on it; a pall. | |
| 3. | (Zool.) The mantle of a bivalve. See Mantle. |
| Noun | 1. | pallium - the layer of unmyelinated neurons (the gray matter) forming the cortex of the cerebrum |
| 2. | pallium - (zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell Synonyms: mantle | |
| 3. | pallium - (Roman Catholic Church) vestment consisting of a band encircling the shoulders with two lappets hanging in front and back | |
| 4. | pallium - cloak or mantle worn by men in ancient Rome |