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helicoid

   Also found in: Medical, Wikipedia 0.06 sec.
hel·i·coid  (hl-koid, hl-)
adj.
Arranged in or having the approximate shape of a flattened coil or spiral.
n. Mathematics
A surface in the form of a coil or screw.

[Greek helikoeids : helix, helik-, spiral; see helix + -oeids, -oid.]

helicoid  (hl-koid, hl-)
Adjective
Arranged in or having the approximate shape of a flattened coil or spiral curve.
Noun
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.

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? Mentioned in ? References in periodicals archive
 
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.
Augers: mounted, flighting: helicoid & sectional.
Among the most significant patented designs are copper heatsinks, helicoid aluminum pins and liquid cooling systems for personal computers.
 
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