persiennes

[pur-zee-enz; French per-syen] /ˌpɜr ziˈɛnz; French pɛrˈsyɛn/
noun
1.
(used with a plural verb) Persian blinds.
2.
(used with a singular verb) a printed or painted fabric of cotton or silk.
Origin
1835-45; < French, noun use of plural of persienne, feminine of persien, obsolete variant of persan Persian
British Dictionary definitions for persiennes

persiennes

/ˌpɜːsɪˈɛnz/
plural noun
1.
outside window shutters having louvres to keep out the sun while maintaining ventilation Also called Persian blinds
Word Origin
C19: from French, from persien Persian