pyrimidine: المعنى والتعريفات

A single-ringed, crystalline organic base, C4H4N2, that is the parent compound of a large group of biologically important compounds.

Any of a group of substituted derivatives of pyrimidine, including the nitrogen bases uracil, cytosine, and thymine, which are components of nucleic acids. Barbiturates and certain other drugs are also pyrimidines.