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helicoid Syllabification: hel·i·coid
Pronunciation: /ˈheləˌkoid/

Definition of helicoid in English:


1An object of spiral or helical shape.
Example sentences
  • If the disk's surface curved a lot, the disk could arrange itself only one way - as a double spiral staircase like a helicoid.
1.1 Geometry A surface formed by simultaneously moving a straight line along an axis and rotating it around it (like a screw thread).
Example sentences
  • One of the clues that a helicoid is an efficient surface and not just an accident is its ubiquity in nature.


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Of the form of a helix or helicoid.
Example sentences
  • Arthropod cuticle can produce unusual optical effects, analogous to solutions of liquid crystals, resulting from a layered, helicoid structure.
  • The pin count for that cooler was 371 helicoid pins.
  • This new helicoid pin design increases surface area for heat dissipation.


Pronunciation: /ˈheləˌkoid(ə)l/
Example sentences
  • The pattern of currents was originally represented as a spiral or helicoidal flow, but more complex cells of circulation have since been identified which can influence the distribution of erosion and deposition.
  • The energy is expressed in terms of the six helicoidal parameters: twist, tilt, roll, shift, slide, and rise.
  • One could pursue this type of analysis further and compute, for example, the correlations between two different helicoidal parameters in different steps, etc.


Late 17th century: from Greek helikoeidēs 'of spiral form', from helix, helik- (see helix).

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