A curve on the surface of a cylinder or cone such that its angle to a plane perpendicular to the axis is constant; the three-dimensional curve seen in a screw or a spiral staircase
The molecular conformation of a spiral nature, generated by regularly repeating rotations around the backbone bonds of a macromolecule Pure and Appl chem, 1989, 61, 769 IUPAC Macromolecular Nomenclature for Crystalline polymers
= A coiled structure If you take a string and coil it around your finger, with no overlaping, you will have a helix A spring is also a helix See Double-Helix Herbal phen-fen = A combination of St Johns Wort and Ma Huang (ephedra) Sold by Nutri/System There are no studies to show this works
A continuous turn that maintains a constant radius over more than 360 degrees, typically 540 degrees or more Ascending helices climb upward while descending helices roll downward
(n) A 3-D curve characterized by a constant rate of curvature about two dimensions and a constant linear translation in the third Threads on screws and bolts are helical and are classified as being either right- or left-handed