核糖核酸 hétánghésuān RNA Definitions Defs Origin Strokes Stroke Words Sentences Sents 脱氧核糖核酸 tuōyǎnghétánghésuān DNA DNA (deoxyribonucleic acid)信使核糖核酸 xìnshǐhétánghésuān mRNA messenger RNA, mRNA去氧核糖核酸 qùyǎnghétánghésuān DNA deoxyribonucleic acid, the molecule that carries genetic instructions in all known living organisms