: 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

Recent Examples on the Web
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China's New Virus Outbreak Explained COVID-19 PCR tests are a highly accurate and widely used method for detecting active COVID-19 infections, and work by identifying and amplifying the genetic material (RNA) of the SARS-CoV-2 virus. Kevin Lynn, Newsweek, 6 Jan. 2025 And many emit tiny bubbles known as vesicles that contain DNA, RNA or other chemicals, like messages in a bottle for whatever cell happens to intercept them. Veronique Greenwood, Quanta Magazine, 6 Jan. 2025 The beetle ingests the RNA, triggering interference by binding to messenger RNA instructions for a gene called PSMB5, which is critical for the elimination of damaged proteins. Andrew Rosenblum, Popular Science, 26 Dec. 2024 Magnesium, which is the fourth most abundant mineral in the human body, has previously been linked to the healthy synthesis of DNA and RNA. Killian Baarlaer, The Courier-Journal, 19 Dec. 2024 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

Dictionary Entries Near RNA

Cite this Entry

“RNA.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/RNA. Accessed 15 Jan. 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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