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cytosine
noun
cy·to·sine
ˈsī-tə-ˌsēn
Examples of cytosine in a Sentence
Recent Examples on the Web
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
The key shows the universal elements (hydrogen, oxygen, carbon and nitrogen), the four bases of the DNA molecule (adenine, cytosine, guanine and thymine) with their molecular structure, where they’re placed in the DNA double helix, and how genes are arranged on a chromosome.
—
New Atlas, 19 Sep. 2024
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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 16 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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