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A three-dimensional model of the DNA molecule, consisting of two complementary polynucleotide strands wound in the form of a double helix and joined in a ladderlike fashion by hydrogen bonds between the purine and pyrimidine bases.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
Watson-Crick modelThe double helix concept of the DNA molecule, proposed by two workers in Cambridge in 1953, which triggered off a revolution in biology and medicine and led to an explosive succession of advances in genetics. (James D. Watson, b. 1928, American molecular biologist; and Francis H. C. Crick, b. 1916, English biochemist, now neurophysiologist).
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005