samara

/səˈmɑːrə/
noun
  1. A dry, winged fruit that does not split open, such as that of a maple, ash, or elm tree.
    • Each samara contains a single seed surrounded by a papery wing that helps it travel on the wind.
    • In autumn, the ground is covered with the helicopter-like samaras of the ash tree.
    • The children collected samaras from the maple tree and watched them spin as they fell.