What does helix mean?
A helix is a spiral or coil, especially one formed by a line or structure that twists around a central axis. The word is most famous from molecular biology: DNA consists of two strands wound together in a double helix, while many proteins contain regions called alpha helices. It can also describe a geometric spiral, a coiled object, or an architectural form that rises in a twisting path. The term comes from Greek through Latin and literally refers to a spiral. Because it is both precise and vivid, “helix” is useful when describing the characteristic turning forms found in nature, chemistry, architecture, and design. It is not simply a general synonym for “twist,” since a helix usually has a regular spiral structure.
A spiral, coil, or regularly twisted structure; especially a spiral form in biology, geometry, or architecture.
"Each protein segment may fold into a stable helix."
In biology, the term is often part of a standard compound, such as “double helix” or “alpha helix.”
To form, turn, or coil into a helix.
"The flexible strip can helix around the support."
This verb is rare and mainly occurs in technical or descriptive writing.
The plural “helices” is also used, especially in mathematical and biological contexts.
"Several double helixes were examined under the microscope."
The famous double helix of DNA made this ancient word for a spiral one of biology’s most recognizable terms.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does helix come from?
English “helix” comes through Latin from Greek hélix, meaning “spiral” or “coil,” a root associated with the Greek verb heliktein, “to turn.” The word entered English in the early modern period and was later widely applied in biology to DNA and protein structures. Related forms include “helical,” “helicoid,” and “helicopter,” whose combining element derives from the same Greek word.
Related word forms
How helix is actually used
The word is formal and technical in biological contexts, but it can be used generally for any prominent spiral or coil. In biochemistry, an alpha helix and a double helix are specific, standardized structures rather than merely decorative spirals.