helices
Definition
- Noun (plural of helix):
- A spiral or coiled shape: "helices" refers to three-dimensional curves that twist around a central axis, commonly found in nature, mathematics, and engineering.
- In anatomy: The "helices" are the curved, raised ridges of the external ear (the pinna), specifically the outer rim of the ear.
- In biology: "helices" can refer to the spiral structures in molecules like DNA (double helix) or the coiled shells of certain mollusks (e.g., snails).
Usage Examples
- General spiral shape: (Two spiral strands twisting together.)
- Anatomical reference: (The outer rims of the ears.)
- Mathematical context: (Spiral curves with a constant diameter.)
Advanced Usage
- "Double helix": A specific term for the structure of DNA, consisting of two complementary helices.
- Watson and Crick discovered the double helix in 1953. (The two spiral strands of DNA.)
- "Alpha helices": In biochemistry, a common secondary structure in proteins where the polypeptide chain forms a right-handed spiral.
- Alpha helices are stabilized by hydrogen bonds between amino acids. (Spiral protein segments.)
Variants and Related Words
- Helix (n, singular): a single spiral or coiled structure.
- A helix can be seen in the shape of a spring. (A single spiral curve.)
- Helical (adj): having the shape of a helix; spiral.
- The helical staircase wound elegantly upward. (The staircase was shaped like a spiral.)
- Helicoid (adj): resembling a helix or spiral.
- The helicopter's blades have a helicoid shape. (They twist like a helix.)
Synonyms
- Spirals: curves that wind around a central point or axis.
- Coils: loops or rings that form a spiral pattern.
- Twists: turns or bends that create a helical shape.
Related Idioms
- (no common idioms directly using "helices")
- "In a spiral": a figurative phrase meaning a continuous, often downward, cycle.
- The economy entered a downward spiral. (A worsening cycle, not directly related to helices but sharing the spiral concept.)