domino
long, enveloping silk cloak, originally black, worn by Italian clergy, and adopted in the 18th century as a disguise
en-US/ˈdɑməˌnoʊ/
en-GB/ˈdɒmɪnəʊ/
long, enveloping silk cloak, originally black, worn by Italian clergy, and adopted in the 18th century as a disguise