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helicoid

 - 5 dictionary results

hel⋅i⋅coid

  [hel-i-koid, hee-li-]
Use helicoid in a Sentence
–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; < Gk helikoeids of spiral form. See helic-, -oid

Related forms:
hel⋅i⋅coi⋅dal, adjective
hel⋅i⋅coi⋅dal⋅ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To helicoid
hel·i·coid   (hěl'ĭ-koid', hē'lĭ-)   
adj.  Arranged in or having the approximate shape of a flattened coil or spiral.
n.   Mathematics
A surface in the form of a coil or screw.

[Greek helikoeidēs : helix, helik-, spiral; see helix + -oeidēs, -oid.]
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: he·li·coid
Pronunciation: 'hel-&-"koid, 'hE-l&-
Variant: or he·li·coi·dal /"hel-&-'koid-&l, "hE-l&-/
Function: adjective
1 : forming or arranged in a spiral
2 : having the form of a flatcoil or flattened spiral
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

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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Science Dictionary
helicoid   (hěl'ĭ-koid', hē'lĭ-)  Pronunciation Key 
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.
Cite This Source
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