helicoid

(redirected from helicoids)
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spiral

 [spi´ral]
1. winding like the thread of a screw; called also helical.
2. a winding structure; see also coil and helix.
Curschmann's s's coiled fibrils of mucin sometimes found in the sputum of patients with asthma. See also Laënnec's pearls.

hel·i·coid

(hel'i-koyd),
Resembling a helix.
Synonym(s): helical (2)
[G. helix, a coil, + eidos, resemblance]

hel·i·coid

(hel'i-koyd)
Resembling a helix.
Synonym(s): helical (2) .
[G. helix, a coil, + eidos, resemblance]

helicoid

coiled; spiral.
References in periodicals archive ?
The cylindrical worm having the flanks as helical surfaces of the type involute helicoid is named involute worm or E worm.
The cylindrical worm having the flanks helical surfaces of the type of Archimedes helicoid is named Archimedes worm or A worm.
Mathematicians can also imagine twisting that plane to produce another infinite shape called the helicoid.
For centuries, the plane and the helicoid were the only known examples of infinite, unbounded minimal surfaces that don't fold back to intersect themselves.
Although computer images and other evidence strongly suggested that the new surface met the criteria for placing it, alongside the helicoid and the plane, in the minimal-surface hall of fame, that wasn't enough for mathematicians.
15 Proceedings of the National Academy of Sciences, establishes that a particular shape--a helicoid with a handle--doesn't intersect itself.
Twisting the ordinary two-dimensional plane into a helicoid converts the plane's flatness into saddle-based curviness.