Cytosine definition

sītə-sēn
A pyrimidine base, C4 H5 N3 O, that is the constituent of DNA and RNA involved in base-pairing with guanine.
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A pyrimidine base, C4H5N3O, contained in the nucleic acids of all tissue: it links with guanine in the DNA structure.
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A pyrimidine base, C4 H5 N3 O, that is the constituent of DNA and RNA involved in base-pairing with guanine.
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A pyrimidine base that is a component of DNA and RNA, forming a base pair with guanine. Chemical formula: C4H5N3O.
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(biochemistry) A base, C4H5N3O, which pairs with guanine in DNA and RNA.
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Other Word Forms

Noun

Singular:
cytosine
Plural:
cytosines

Origin of cytosine

  • cyt(o)– (rib)os(e) –ine

    From American Heritage Dictionary of the English Language, 5th Edition

  • After German Cytosin, from cyto- + -ose + -ine.

    From Wiktionary