: 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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Last spring, Ohio State University researchers found H5N1 viral RNA in 58 of 150 commercially available milk product samples from 10 states. Asha Subramanian, Baltimore Sun, 12 Feb. 2025 These include protein synthesis, blood pressure and blood glucose regulation, muscle and nerve function, and DNA and RNA synthesis. Maggie O'Neill, Verywell Health, 11 Feb. 2025 Through genetic sequencing and computer modeling, my lab is able to profile all the RNA molecules in a brain region and understand how their rhythmicity – the peaks and troughs of their activity across the day – changes due to opioids. Mackenzie Gamble, The Conversation, 10 Feb. 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, WIRED, 9 Feb. 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

Dictionary Entries Near RNA

Cite this Entry

“RNA.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/RNA. Accessed 22 Feb. 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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