from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of numerous, usually twining vines of the related genera Argyreia, Calystegia, Convolvulus, Merremia, and Ipomoea, having funnel-shaped, variously colored flowers that close late in the day.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Several members of the Convolvulaceae family; climbing plants with trumpet shaped flowers.
  • n. An erection present on waking.
  • n. A rolling cloud in the shape of a cylinder.


Sorry, no etymologies found.


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  • A strain of medical marijuana.

    January 15, 2010

  • Amazing.

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  • Another photo, which shows the phenomenon very clearly.

    September 27, 2009

  • For a fascinating cloud formation, see here--with thanks to bilby.

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