Definition of helix in English:

helix

noun

  • 1An object having a three-dimensional shape like that of a wire wound uniformly in a single layer around a cylinder or cone, as in a corkscrew or spiral staircase.

    • ‘The building blocks are chosen so that the ribbon curls into a helix.’
    • ‘The crucial trick is that the helix is not even: it has a significantly larger diameter in the middle than at the ends.’
    • ‘Seven of the predicted helices in our final structure are consistent with the model of MacDonald.’
    • ‘Both had almost the same number of helices, strands and turns.’
    • ‘The fibers themselves are assumed to be straight helices.’
    • ‘He was looking at the picture of the helix.’
    • ‘Although Concrete art is typically austerely geometrical, it is not necessarily so; Bill's sculpture, for example, often uses graceful spiral or helix shapes.’
    • ‘Terrified, he ran to a stairwell; its helix curved upward toward the floors above.’
    • ‘They found that DNA consists of two connected twisted strands in the shape of a helix.’
    • ‘The excess is carefully cut away to fabricate the helix shape.’
    • ‘It described his proposal for a different type of helical structure, which he called the helix.’
    • ‘A television monitor showed what was inside: a glowing ball of gas surrounded by a metal helix.’
    spiral, coil, curl, corkscrew, twist, twirl, loop, gyre, whorl, scroll, curlicue, convolution
    volute, volution
    View synonyms
    1. 1.1Geometry A curve on a conical or cylindrical surface that would become a straight line if the surface were unrolled into a plane.
      • ‘A template in the shape of a narrow right-angle triangle is wrapped around the cylinder to be threaded, and the hypotenuse of the triangle forms the line of the helix.’
      • ‘The conical helix of their upward spiral against the flat blue sky is completely hypnotic.’
    2. 1.2Biochemistry An extended spiral chain of atoms in a protein, nucleic acid, or other polymeric molecule.
      • ‘The gray bands indicate the helix regions of the protein.’
      • ‘The double helix of DNA is held together by hydrogen bonds.’
      • ‘It turns out that a helix, essentially, is a great way to bunch up a very long molecule, such as DNA, in a crowded place, such as a cell.’
      • ‘DNA molecules in nature are built from two complementary strands that bind to form the double helix.’
      • ‘Part of the gene was not arranged in the double helix structure, they noticed.’
    3. 1.3Architecture A spiral ornament.
      • ‘Ross Lovegrove's stairway, with its helix profile, is part of a new tendency by designers to borrow forms from nature.’
    4. 1.4Anatomy The rim of the external ear.
      • ‘The ear print on the safe had a circular mark at the top of the ear helix.’
      • ‘Decrease oxygen saturation in blood in the helix of the ear by using an ear oximeter.’

Origin

Mid 16th century (in the architectural sense spiral ornament): via Latin from Greek.

Pronunciation:

helix

/ˈhēliks/