1. thymine

noun. a base found in DNA (but not in RNA) and derived from pyrimidine; pairs with adenine.


  • DNA
  • deoxyribonucleic acid
  • desoxyribonucleic acid
  • pyrimidine


  • exon

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Sentences with thymine

1. Noun, singular or mass
Each adenine on the old strand will get a new thymine, each old guanine will get a new cytosine, and vice versa.

2. Verb, non-3rd person singular present
DNA code consists of pairs of the nitrogenous bases adenine, thymine, cytosine and guanine. The bases adenine and thymine form a pair as do the bases cytosine and guanine.

3. Adjective
But while the second pyrimidine base in DNA is thymine (T) in RNA this base is uracil (U).