zucchetto
/tsuːˈketəʊ/noun
(pl. -os)
- a Roman Catholic cleric's skullcap: black for a priest, purple for a bishop, red for a cardinal, and white for the Pope（罗马天主教牧师戴的）圆顶小帽（以颜色区别职位：神父黑色, 主教紫色, 红衣主教赤色, 教皇白色）。
词源
mid 19th cent.: from Italian zucchetta, diminutive of zucca 'gourd， head'.