belle-de-jour

== French == === Pronunciation === IPA(key): /bɛl.də.ʒuʁ/ === Noun === belle-de-jour f (plural belles-de-jour) a cultivated species of bindweed, Convolvulus tricolor whose flowers are only open for a day === Further reading === “belle-de-jour”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012