DNA ( deoxyribonucleic acid):One of two types of nucleic acid (the other is RNA); a complex organic compound found in all living cells and many viruses.

• 去氧核糖核酸:核酸的两种形式之一(另一种是核糖核酸);分子结构复杂的有机化合物,见于所有的原核细胞、真核细胞及多种病毒中。