base pair: one of the pairs of chemical bases joined by hydrogen bonds that connect the complementary strands of a DNA molecule or of an RNA molecule that has two strands; the base pairs are adenine with thymine and guanine with cytosine in DNA and adenine with uracil and guanine with cytosine in RNA
relation: an abstraction belonging to or characteristic of two entities or parts together
warning of war: a warning to national policy makers that an enemy intends war or is preparing for war and is on a course that increases the risk of war