LEARNit Dictionary
double helix
noun
/ˌdʌbl ˈhiːlɪks/
UK
/ˌdʌbl ˈhiːlɪks/
US
1
the structure of DNA, consisting of two connected long thin pieces that form a spiral shape
مارپیچ دوگانه, مارپیچ مضاعف