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double helix

noun, Biochemistry, Genetics.
1.
the spiral arrangement of the two complementary strands of DNA.
Origin
1953
1953; term introduced by J.D. Watson and F.H.C. Crick
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for double helix
  • They didn't give her credit for her photographs that they took of the double helix.
  • It's made up of two matching spirals, known as the double helix.
  • Chemicals are then added and the temperature is lowered, allowing each strand to replicate itself and form a new double helix.
  • Their structure--an elegant double helix--almost merited such enthusiasm.
  • They point out that two wires become maximally twisted when no more rotations can be added with deforming the double helix.
British Dictionary definitions for double helix

double helix

noun
1.
(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
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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double helix in Medicine

double helix n.
The coiled structure of a double-stranded DNA molecule in which strands linked by hydrogen bonds form a spiral configuration. Also called DNA helix, Watson-Crick helix.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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double helix in Science
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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double helix in Culture
double helix [(hee-liks)]

The shape taken by the DNA molecule. A helix is a three-dimensional spiral, like the shape of a spring or the railing on a spiral staircase. A DNA molecule consists of two helixes intertwined.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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