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Related to cytosine: cytidine
n. Abbr. C
A pyrimidine base, C4H5N3O, that is the constituent of DNA and RNA involved in base-pairing with guanine.
cy•to•sine(ˈsaɪ təˌsin, -ˌzin, -sɪn)
a pyrimidine base, C4H5N3O, that is one of the fundamental components of DNA and RNA, in which it forms a base pair with guanine. Symbol: C
A base that is a component of DNA and RNA, forming a base pair with guanine.
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|Noun||1.||cytosine - a base found in DNA and RNA and derived from pyrimidine; pairs with guanine|
deoxyribonucleic acid, desoxyribonucleic acid, DNA - (biochemistry) a long linear polymer found in the nucleus of a cell and formed from nucleotides and shaped like a double helix; associated with the transmission of genetic information; "DNA is the king of molecules"
ribonucleic acid, RNA - (biochemistry) a long linear polymer of nucleotides found in the nucleus but mainly in the cytoplasm of a cell where it is associated with microsomes; it transmits genetic information from DNA to the cytoplasm and controls certain chemical processes in the cell; "ribonucleic acid is the genetic material of some viruses"
pyrimidine - any of several basic compounds derived from pyrimidine