any of several night-blooming convolvulaceous plants, esp the white-flowered Calonyction (or Ipomoea) aculeatum
2. Also called: angels' tears
a Mexican solanaceous plant, Datura suaveolens, planted in the tropics for its white night-blooming flowers
moonflower in American English
(munˌflaʊər)
noun
any of a genus (Calonyction) of tropical American, perennial twining vines of the morning-glory family, with heart-shaped leaves and large, fragrant white or purple flowers that bloom at night