biretta

詳細解釋：

biretta 也作 be.ret.ta 或 ber.ret.ta

n.（名詞）
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.
法冠：帽頂有三或四道邊的硬方帽，尤為羅馬天主教教士所戴，牧師戴黑色，主教戴紫色，紅衣主教戴紅色

來源：
Italian berretta
義大利語 berretta
from Old Provenôal berret [cap]
源自 古普羅旺斯語 berret [帽]
from Late Latin birrus [hooded cloak]
源自 後期拉丁語 birrus [有頭罩的外套]
[probably of Celtic origin]
[可能源於凱爾特語的]