from The Century Dictionary.

  • Coiled in one plane, like a watch-spring or flat spiral, as the antlia of a butterfly; whorled in discoid form, as a shell of the genus Planorbis. Also planospiral.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective coiled in the plane (as opposed to helical)


Sorry, no etymologies found.


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  • I must say though that these look surprisingly flat to me, almost planispiral, they don't look 100% familiar to me...

    Aliens in Montreal

  • Incidentally, these shells are almost completely flat and come very close to being planispiral.

    Archive 2006-08-01


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