Definition of helicoid in English:

helicoid

Syllabification: hel·i·coid
Pronunciation: /ˈheliˌkoid
 
/

noun

1An object of spiral or helical shape.
More 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).
More example sentences
  • One of the clues that a helicoid is an efficient surface and not just an accident is its ubiquity in nature.

adjective

Back to top  
Of the form of a helix or helicoid.
More 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.

Origin

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

Derivatives

helicoidal

Pronunciation: /ˌheliˈkoidəl/
adjective
More 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.

Definition of helicoid in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day dinkum
Pronunciation: ˈdɪŋkəm
adjective
(of an article or person) genuine, honest, true