- a nucleoside, C10H14N2O5, containing thymine and deoxyribose, that is a constituent of DNA.
- the crystalline nucleoside of thymine, found in DNA. Formula: C 10 H 14 N 2 O 5
- A nucleoside composed of thymine and deoxyribose.
- A nucleoside composed of thymine and deoxyribose that (with the addition of phosphate to form the nucleotide thymine) occurs in DNA. Radioactively tagged thymidine has been used in genetics research to study DNA synthesis in the nuclei of cells undergoing cell division. Chemical formula: C10H14N2O5.