1.  pallium(n = noun.body) cerebral cortex, cerebral mantle, cortex - the layer of unmyelinated neurons (the grey matter) forming the cortex of the cerebrum;
is a kind of neural structure
is a part of cerebrum
has parts: golgi's cell, golgi cell, cortical area, cortical region, frontal cortex, frontal lobe, prefrontal cortex, prefrontal lobe, parietal cortex, parietal lobe, occipital cortex, occipital lobe, temporal ccortex, temporal lobe
has particulars: neocortex, neopallium, archipallium, paleocortex

2.  pallium(n = noun.body) mantle - (zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell;
is a kind of cuticle, epidermis

3.  pallium(n = noun.artifact) - (Roman Catholic Church) vestment consisting of a band encircling the shoulders with two lappets hanging in front and back;
is a kind of vestment

4.  pallium(n = noun.artifact) - cloak or mantle worn by men in ancient Rome;
is a kind of cloak

1.  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. [1913 Webster]

2.  A band of white wool, worn on the shoulders, with four purple crosses worked on it; a pall. [1913 Webster]
" The wool is obtained from two lambs brought to the basilica of St. Agnes, Rome, and blessed. It is worn by the pope, and sent to patriarchs, primates, and archbishops, as a sign that they share in the plenitude of the episcopal office. Before it is sent, the pallium is laid on the tomb of St. Peter, where it remains all night." [1913 Webster]

3.  The mantle of a bivalve. See Mantle. [1913 Webster]

pallium, n. (pl. palliums or pallia)
1 an ecclesiastical pall, esp. that sent by the Pope to an archbishop as a symbol of authority.
2 hist. a man's large rectangular cloak esp. as worn in antiquity.
3 Zool. the mantle of a mollusc or brachiopod .

Etymology:
L

N  canonicals, vestments, robe, gown, Geneva gown frock, pallium, surplice, cassock, dalmatic, scapulary, cope, mozetta, scarf, tunicle, chasuble, alb, alba, stole, fanon, fannel, tonsure, cowl, hood, calote, calotte, bands, capouch, amice, vagas, vakas, vakass, apron, lawn sleeves, pontificals, pall, miter, tiara, triple crown, shovel hat, cardinal's hat, biretta, crosier, pastoral staff, thurifer, costume.