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Definition of: pyrimidine
(pī·rim′ə·dēn, -din, pir′ə·mə·dēn′, -din′) noun Chem.
An organic compound, C4H4N2, resulting from the acid hydrolysis of a nucleic acid; a constituent of thiamine. Also py·rim′i·din (-din). [<G pyrimidin <pyridin pyridine]
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