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double-date
double-dealing
double-decker
double-declining balance
double-declutch
double decomposition
double-density
double descent
double digging
double-digit
double digits
double-dip
double dipping
double dissolution
double doors
double-dotted
double dribble
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double helix

dou·ble he·lix (plural dou·ble hel·i·ces or dou·ble he·lix·es)


noun 
Definition:
 
double spiral structure of DNA: the molecular structure of DNA, consisting of a pair of polynucleotide strands connected by a series of hydrogen bonds and wound in opposing spirals

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