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NCI Dictionary of Cancer Terms


thymine  listen  (THY-meen)

  A chemical compound that is used to make one of the building blocks of DNA. It is a type of pyrimidine.

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Structure of DNA; drawing shows a chromosome, nucleosome, histone, gene, and nucleotide base pairs: guanine, cytosine, adenine, and thymine. Also shown is a cell and its nucleus.