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Definition from

double helix


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90% of the time, speakers of English use just 7,500 words in speech and writing.These words appear in red, and are graded with stars. One-star words are frequent, two-star words are morefrequent, and three-star words are the most frequent.

noun [countable] biology British English pronunciation: double helix 
Word Forms
singulardouble helix
pluraldouble helixes or double helices

This is the British English definition of double helix. View American English definition of double helix