[base pair] n (1962): one of the pairs of chemical bases composed of a purine on one strand of DNA joined by hydrogen bonds to a pyrimidine on the other that hold together the two complementary strands much like the rungs of a ladder and include adenine linked to thymine or sometimes to uracil and guanine linked to cytosine
BASE PAIR
Meaning of BASE PAIR in English
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012