| 单词 | uracil |
| 释义 | uracil /yoor"euh sil/, n. Biochem. a pyrimidine base, C4H4N2O2, that is one of the fundamental components of RNA, in which it forms base pairs with adenine. Symbol: U [1905-10; UR-1 + AC(ETIC) + -il, of uncert. orig.] |
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