a stiff clerical cap having either three or four upright pieces projecting outwards from the centre to the edge: coloured black for priests, purple for bishops, red for cardinals, and white for certain members of religious orders
Word origin
C16: from Italian berretta, from Old Provençal berret, from Late Latin birrus hooded cape
biretta in American English
(bəˈrɛtə)
noun
a hard, square, ceremonial hat with three or four vertical projections and sometimes with a pompom or tassel at the top, worn by Roman Catholic clergy
Word origin
It berretta < LL birrettum, dim. of L birrus, a hood, cloak, prob. < Celt base, as in Cymric byrr, MIr berr, short