four-o'clock
four–o'clock
noun \ˈfȯr-ə-ˌkläk\Definition of FOUR-O'CLOCK
: any of a genus (Mirabilis) of chiefly American annual or perennial herbs (family Nyctaginaceae, the four-o'clock family) having apetalous flowers with a showy involucre simulating a calyx; especially : a garden plant (M. jalapa) with fragrant yellow, red, or white flowers opening late in the afternoon
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1756
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