: a pyrimidine base C5H6N2O2 that is one of the four bases coding genetic information in the polynucleotide chain of DNA compare adenine, cytosine, guanine, uracil
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Biology’s four bases—adenine (A), thymine (T), cytosine (C) and guanine (G)—encode the instructions that keep life alive.—Andrew Whalen, Forbes.com, 9 July 2025 The metaphor leaps out: Like letters of the alphabet, molecules (the nucleotide bases A, T, C and G, for adenine, thymine, cytosine and guanine) are arranged into sequences — words, paragraphs, chapters, perhaps — in every organism, from bacteria to humans.—Ingrid Wickelgren, Quanta Magazine, 5 Feb. 2025 The team also detected adenine, guanine, cytosine, thymine and uracil — all five of the biological nucleobases, or components that make up the genetic code in DNA and RNA.—Ashley Strickland, CNN, 29 Jan. 2025 The other paper, in the journal Nature Astronomy, was even more tantalizing, reporting the discovery of all five nucleobases that make up DNA and RNA—adenine, guanine, cytosine, thymine, and uracil—in the Bennu samples.—Jeffrey Kluger, TIME, 29 Jan. 2025 See All Example Sentences for thymine
Word History
Etymology
International Scientific Vocabulary, from New Latin thymus
: a pyrimidine base C5H6N2O2 that is one of the four bases coding genetic information in the polynucleotide chain of DNA compare adenine, cytosine, guanine, uracil
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