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double helix

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.05 sec.
double helix
n.
The coiled structure of double-stranded DNA in which strands linked by hydrogen bonds form a spiral configuration, with the two strands oriented in opposite directions.
double helix
n
(Life Sciences & Allied Applications / Biochemistry) Biochem the form of the molecular structure of DNA, consisting of two helical polynucleotide chains linked by hydrogen bonds and coiled around the same axis
double helix
The three-dimensional structure of double-stranded DNA, in which polymeric nucleotide strands whose complementary nitrogen bases are linked by hydrogen bonds form a helical configuration. The two DNA strands are oriented in opposite directions.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.double helixdouble helix - a pair of parallel helices intertwined about a common axis; "the shape of the DNA molecule is a double helix"
helix, spiral - a curve that lies on the surface of a cylinder or cone and cuts the element at a constant angle


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The complex geometry of the double helix twists and turns, generating a succession of oblique surfaces.
Change of gear: the evolution of motoring is vividly brought to life ... by Brensing, Christian / The Architectural Review
Thirteen chapters cover the beginnings of genetics (Mendel to Hitler), the double helix, customizing DNA molecules, biotechnology, genetically modified agriculture, evolution, the genetics of human diseases and disorders, and finally the nature/nurture argument.
Watson, James D., with Andrew Berry. DNA: The Secret of Life by Julian, Janet / Kliatt
This means the double helix "twister channels" spin the oil mist in tight spirals along their length to create turbulence and pressure that forces oil droplets against the channel walls and returns them to the crankcase.
A new twist by Automotive Design & Production
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