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helicoid

[hel-i-koid, hee-li-] /ˈhɛl ɪˌkɔɪd, ˈhi lɪ-/
adjective
1.
coiled or curving like a spiral.
noun
2.
Geometry. a warped surface generated by a straight line moving so as to cut or touch a fixed helix.
Origin
1690-1700
1690-1700; < Greek helikoeidḗs of spiral form. See helic-, -oid
Related forms
helicoidal, adjective
helicoidally, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for helicoid

helicoid

/ˈhɛlɪˌkɔɪd/
adjective
1.
(biology) shaped like a spiral: a helicoid shell
noun
2.
(geometry) any surface resembling that of a screw thread
Derived Forms
helicoidally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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helicoid in Medicine

helicoid hel·i·coid (hěl'ĭ-koid', hē'lĭ-)
adj.
Arranged in or having the general shape of a flattened coil or spiral.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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helicoid in Science
helicoid
  (hěl'ĭ-koid', hē'lĭ-)   
Adjective  Arranged in or having the approximate shape of a flattened coil or spiral curve.

Noun  A surface in the form of a coil or screw. A helicoid is generated mathematically by rotating a plane or twisted curve about an axis at a fixed rate and simultaneously translating it in the direction of the line of axis, also at a fixed rate.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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