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cytosine
noun
cy·to·sine
ˈsī-tə-ˌsēn
Examples of cytosine in a Sentence
Recent Examples on the Web
The metaphor leaps out: Like letters of the alphabet, molecules (the nucleotide bases A, T, C and G, for adenine, thymine, cytosine and guanine) are arranged into sequences — words, paragraphs, chapters, perhaps — in every organism, from bacteria to humans.
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Ingrid Wickelgren, Quanta Magazine, 5 Feb. 2025
The team also detected adenine, guanine, cytosine, thymine and uracil — all five of the biological nucleobases, or components that make up the genetic code in DNA and RNA.
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Ashley Strickland, CNN, 29 Jan. 2025
The other paper, in the journal Nature Astronomy, was even more tantalizing, reporting the discovery of all five nucleobases that make up DNA and RNA—adenine, guanine, cytosine, thymine, and uracil—in the Bennu samples.
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Jeffrey Kluger, TIME, 29 Jan. 2025
Each bead is one of four different nucleotides: adenine, thymine, cytosine, or guanine, which biologists refer to by the letters A, T, C, and G. Strings of these nucleotides encode the building instructions and control switches for proteins and other molecules that do the work of maintaining life.
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Michael C. Schatz, IEEE Spectrum, 27 June 2013
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Word History
Etymology
International Scientific Vocabulary cyt- + -ose + -ine entry 2
First Known Use
1894, in the meaning defined above
Dictionary Entries Near cytosine
Cite this Entry
“Cytosine.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cytosine. Accessed 22 Feb. 2025.
Kids Definition
cytosine
noun
cy·to·sine
ˈsīt-ə-ˌsēn
Medical Definition
cytosine
noun
cy·to·sine
ˈsīt-ə-ˌsēn
More from Merriam-Webster on cytosine
Britannica.com: Encyclopedia article about cytosine
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