uracil

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uracil A pyrimidine derivative and one of the major component bases of nucleotides and the nucleic acid RNA.

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uracil A pyrimidine base that occurs in RNA.

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uracil A pyrimidine base that occurs in RNA.

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uracil (yoor-ă-sil) n. one of the nitrogen-containing bases (see pyrimidine) occurring in the nucleic acid RNA.