helicoid Hear it!

helicoid definition

heli·coid (hel′i ko̵id′)

adjective

shaped like, or coiled in the form of, a spiral, as the shell of a snail or certain inflorescences
also helicoidal hel′i·coi′·dal

Etymology: Gr helikoeidēs < helix, a spiral + -eidēs, -oid

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 © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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