uracil /'juәrәsil/ 📖 中文释义 n. [生化]尿嘧啶 📘 English Definition(英文释义) n a base containing nitrogen that is found in RNA (but not in DNA) and derived from pyrimidine; pairs with adenine ← urachus U 字母词表 uracil deoxyriboside triphosphatase →