(organic chemistry) A diazine in which the two nitrogen atoms are in the meta- positions; it is the basis of three of the bases found in DNA and RNA: thymine, uracil and cytosine

plural of pyrimidine

Of or pertaining to a pyrimidine.

orotic acid

(chemistry) Any of a class of chemical compounds characterized by a pyrimidine ring substituted with two carbonyl groups.

plural of pyrimidinedione

Containing or releasing pyrimidine

(organic chemistry) Any derivative of pyrimidine that has three carbonyl groups in the ring; many are barbiturates

plural of pyrimidinetrione