from The American Heritage® Dictionary of the English Language, 4th Edition
- n. 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.
After James Dewey Watson and Francis Henry Compton Crick.(American Heritage® Dictionary of the English Language, Fourth Edition)
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