helicoid

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Definitions (18)

Toggle American Heritage definitions American Heritage Dictionary (2)

  1. adjective Arranged in or having the approximate shape of a flattened coil or spiral.
  2. noun Mathematics A surface in the form of a coil or screw.

Toggle Century definitions Century Dictionary (13)

Toggle GNU Webster definitions GNU Webster's 1913 (3)

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Examples (1)

  • By referring to the accompanying figure, which we extract from our note on the Ruhmkorff apparatus, it will be seen that the aureola which developed as a circular film from right to left at D, on the north pole of the magnet, N.S. (Fig. 1), projected itself in an opposite direction at C, upon the south pole, S, of the same magnet; but, between the two poles, these two contrary actions being obliged to unite, they gave rise in doing so to a very characteristic helicoid spiral whose direction depended upon that of the current of discharge through the aureola, or upon the polarity of the magnetic poles. —  Scientific American Supplement, No. 344, August 5, 1882
 

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Etymologies (2)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Greek helikoeidēs : helix, helik-, spiral; see helix + -oeidēs, -oid.

Toggle Century etymologies Century Dictionary (1)

  1. from Greek ἑλικοειδής, of winding or spiral form, from ἑλιξ (ἑλικ-), a spiral (see helix), + εῑδος, form.
 

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/ˈhɛlɪkɔɪd/
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