双链核酸 shuāngliànhésuān double-stranded nucleic acid Origin Definitions Defs Strokes Stroke Words Sentences Sents 双链 雙鏈 shuāngliàn double-stranded double-stranded; having two chains or strands, especially in the context of genetics核酸 hésuān nucleic acid An organic compound found in the cells of all living things and viruses, essential for growth, reproduction, and heredity.