: 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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In this image, each color represents a different type of RNA. Discover Magazine, 17 Oct. 2024 Under this concept, an early proto-life-form used RNA both for its enzymatic activities and as its genetic material. Aaron Shattuck, Scientific American, 15 Oct. 2024 This isn't the first time RNA has been honored recently. Alice Park, TIME, 7 Oct. 2024 What is the Nobel Prize for? Advertisement RNA is best known for carrying instructions for how to make proteins from DNA in the nucleus of the cell to tiny cellular factories that actually build the proteins. Daniel Niemann, Los Angeles Times, 7 Oct. 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 16 Nov. 2024.

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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