helix
- Noun:
- A spiral shape or structure: A "helix" is a three-dimensional curve that coils around a central axis, like a spring or a spiral staircase. It is characterized by a constant radius and pitch.
- A curve on a cylindrical or conical surface: In geometry, a "helix" is a curve that lies on the surface of a cylinder or cone and cuts the surface's elements (straight lines) at a constant angle.
- A genus of air-breathing land snails: In biology (capitalized as Helix), it is the type genus of the family Helicidae, which includes common edible snails.
- Noun:
- The DNA molecule has the famous double helix structure.
- The architect designed a beautiful helix staircase for the atrium.
- The wire was bent into a tight helix.
- The genus Helix includes the common garden snail.
"Alpha helix": A common structural motif in proteins, where the polypeptide chain forms a right-handed helical structure stabilized by hydrogen bonds.
- The stability of the protein is due in part to its alpha helix regions.
"Double helix": The structure of DNA, consisting of two complementary helical strands wound around the same axis.
- Watson and Crick discovered the double helix model of DNA.
Helical (adjective): Having the shape or form of a helix; spiral.
- The machine uses a helical gear for smooth power transmission.
Helicoid (noun/adjective): A surface shaped like a spiral ramp (e.g., a spiral staircase); having a helical form.
- The helicoid shape is common in architectural design.
- Spiral: A curve that winds around a central point while continuously receding from or approaching it.
- Coil: A length of something wound in a joined sequence of loops.
- Corkscrew: A device with a spiral metal rod, used metaphorically for a helical shape.
"Triple helix": A model of innovation emphasizing university-industry-government interactions, or a rare triple-stranded DNA structure.
- The region's economic growth is driven by a strong triple helix partnership.
"Helix angle": In mechanical engineering, the angle between a helix and a line parallel to its axis.
- Increasing the helix angle on the gear reduces noise.
(Note: "Helix" is a technical/scientific term and is not commonly used in idiomatic expressions. The related phrases above are fixed technical terms.)
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type genus of the family Helicidae
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a structure consisting of something wound in a continuous series of loops
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a coil of rope
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a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle
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