: any of various nucleic acids that contain ribose and uracil as structural components and are associated with the control of cellular chemical activities compare messenger rna, ribosomal rna, transfer rna

Examples of RNA in a Sentence

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Currently there are three companies looking at the DNA and RNA treatment for GSD1a, according to Dr. Rebecca Riba-Wolman, a pediatric endocrinologist and a physician scientist at both Connecticut Children’s Research Institute and UConn Health, who is leading the clinical trial. Livi Stanford, Hartford Courant, 17 July 2025 Their genetic material is packaged on eight segments of RNA that can easily get swapped around into new arrangements when two different flu viruses infect the same animal. Meghan Bartels, Scientific American, 15 July 2025 Cells are almost always creating, touching, manipulating or otherwise handling RNA in one form or another. Dan Samorodnitsky, Quanta Magazine, 14 July 2025 Of the more than 27,000 guano samples analyzed, just over 1% tested positive for avian influenza RNA. John Drake, Forbes.com, 28 June 2025 See All Example Sentences for RNA

Word History

Etymology

ribonucleic acid

First Known Use

1942, in the meaning defined above

Time Traveler
The first known use of RNA was in 1942

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Cite this Entry

“RNA.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/RNA. Accessed 26 Jul. 2025.

Kids Definition

: any of various nucleic acids that are typically found in the cytoplasm of cells, are usually composed of a single chain of nucleotides, differ from DNA in containing ribose as the five-carbon sugar instead of deoxyribose, and that function mostly in protein synthesis

called also ribonucleic acid

compare messenger rna, ribosomal rna, transfer rna

Medical Definition

: any of various nucleic acids that contain ribose and uracil as structural components and are associated with the control of cellular chemical activities

called also ribonucleic acid

see messenger rna, ribosomal rna, transfer rna

More from Merriam-Webster on RNA

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