: 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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The bases are split into two categories: purines (adenine and guanine) and pyrimidines (thymine, cytosine and uracil).—Devika Rao, TheWeek, 24 Mar. 2026 Scientists have discovered that a sample of the Ryugu asteroid collected by Japan's Hayabusa 2 spacecraft contains the nucleobases adenine, guanine, cytosine, thymine and uracil, the building blocks of DNA and RNA upon which all life is based.—Robert Lea, Space.com, 17 Mar. 2026 Those rungs are made up of pairs of four different chemical building blocks, called bases — adenine, thymine, cytosine and guanine (A,T,C and G).—F.d. Flam, Mercury News, 26 Nov. 2025 Adenine always pairs with thymine, and guanine always pairs with cytosine.—IEEE Spectrum, 2 Oct. 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