Helix
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A helix is a shape like a cylindrical coil spring or the thread of a machine screw. It is a type of smooth skew curve with tangent lines at a constant angle to a fixed axis. Helices are important in b
(l-r) Tension, compression and torsion coil springs
A machine screw
Crystal structure of a folded molecular helix reported by Lehn et al.
A natural left-handed helix, made by a climber plant
Spiral
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In mathematics, a spiral is a curve which emanates from a point, moving further away as it revolves around the point. It is a subtype of whorled patterns, a broad group that also includes concentric o
Helix
…cylinder that it spirals around, and its pitch (the height of one complete helix turn). A conic helix, also known as a conic spiral, may be defined as a spiral on a conic surface, with the distance to the apex an exponential function of the angle indicating direction from the axis. A curve is called a general…
Cutaway of a nautilus shell showing the chambers arranged in an approximately logarithmic spiral
An artist's rendering of a spiral galaxy
Sunflower head displaying florets in spirals of 34 and 55 around the outside
Cucuteni culture spirals on a bowl on stand, a vessel on stand, and an amphora, 4300-4000 BCE, ceramic, Palace of Culture, Iași, Romania