EXAMPLES | WORD ORIGIN adjective coiled or curving like a spiral. noun . Geometry a warped surface generated by a straight line moving so as to cut or touch a fixed helix. Origin of helicoid
First recorded in
is from the
of spiral form. See
-oid Related forms hel·i·coi·dal, adjective hel·i·coi·dal·ly, adverb
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for helicoidal Historical Examples of helicoidal British Dictionary definitions for helicoidal adjective also: helicoidal biology shaped like a spiral a helicoid shell noun geometry any surface resembling that of a screw thread Derived Forms helicoidally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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helicoid [hĕl ′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.
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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.