Dictionary.com
Thesaurus.com
Synonyms

helicoid

American  
[hel-i-koid, hee-li-] / ˈhɛl ɪˌkɔɪd, ˈhi lɪ- /

adjective

  1. coiled or curving like a spiral.


noun

  1. Geometry. a warped surface generated by a straight line moving so as to cut or touch a fixed helix.

helicoid British  
/ ˈhɛlɪˌkɔɪd /

adjective

  1. biology shaped like a spiral

    a helicoid shell

"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

noun

  1. geometry any surface resembling that of a screw thread

"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
helicoid Scientific  
/ hĕlĭ-koid′,hēlĭ- /
  1. Arranged in or having the approximate shape of a flattened coil or spiral curve.


  1. 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.

Other Word Forms

  • helicoidal adjective
  • helicoidally adverb

Etymology

Origin of helicoid

First recorded in 1690–1700, helicoid is from the Greek word helikoeidḗs of spiral form. See helic-, -oid

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Complex, user-prescribed, three-dimensional cavities can be produced within this molecular canvas, enabling the creation of shapes such as letters, a helicoid and a teddy bear.

From Nature

“When a small crack forms, it has to travel a very tortuous path — around and around the helicoid — in order to escape the entire club but runs out of energy and stays in the club,” Kisailus said.

From Washington Post

Kisailus and his colleagues created a carbon-fiber version of the peacock mantis shrimp’s helicoid, using epoxy as fill-in, and put it to the test against two other composites made from the same basic components.

From Washington Post

“When a small crack forms, it has to travel a very tortuous path — around and around the helicoid — in order to escape the entire club, but runs out of energy and stays in the club,” said Kisailus.

From Washington Post

A rough way to visualize this, is to see the endoplasmic reticulum as a parking garage, with the helicoid acting as the connection ramps between each floor.

From Forbes