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helicoidal
Variant of helicoid
adjective
shaped like, or coiled in the form of, a spiral, as the shell of a snail or certain inflorescences
also helicoidal
noun
Geom. a surface generated by the rotation of a plane or twisted curve about a fixed line so that each point of the curve traces out a circular helix with the fixed line as axis
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
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