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From Biology-Online Dictionary | Biology-Online Dictionary
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A pyrimidine nucleoside that has thymine bound to a deoxyribose sugar.


Deoxythymidine when phosphorylated forms thymine nucleotide that pairs with adenine nucleotide in a DNA molecule. Since thymine nucleotides are precursors of DNA, not RNA, deoxythymidine is simply called thymidine.

IUPAC name: 1-[(2R,4S, 5R)-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-methylpyrimidine-2,4-dione
Molecular formula: C10H14N2O5


  • 2'-Deoxythymidine
  • thymidine
  • 5-Methyl-2'-deoxyuridine
  • thymine deoxyriboside

See also: nucleoside.