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Related to biretta: beretta
bi·ret·taalso be·ret·ta (bə-rĕt′ə)
A stiff square cap with three or four ridges across the crown. Birettas are worn especially by Roman Catholic clergy and are black for priests, purple for bishops, and red for cardinals.
[Italian berretta, from Old Provençal berret, cap, from Late Latin birrus, hooded cloak, probably of Celtic origin; perhaps akin to Irish berr and Welsh byrr, short.]
(Roman Catholic Church) RC Church 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
[C16: from Italian berretta, from Old Provençal berret, from Late Latin birrus hooded cape]
n., pl. -tas.
a stiff square cap with three or four upright projecting pieces, worn by ecclesiastics.
[1590–1600; < Italian berretta, feminine variant of berretto < Old Provençal berret < Medieval Latin birrettum cap]