plas·​mid | \ ˈplaz-məd How to pronounce plasmid (audio) \

Definition of plasmid

: an extrachromosomal ring of DNA especially of bacteria that replicates autonomously

Examples of plasmid in a Sentence

Recent Examples on the Web Inovio's technology uses a brief electrical pulse to deliver plasmids, or small pieces of genetic information, into human cells. Elizabeth Cohen, CNN, "With big talk and hurled insults, the gloves come off in the race for the coronavirus vaccine," 27 May 2020 The second portion of the vaccine is a concentrated dose of DNA strands, called a plasmid, that finds its way into cells. oregonlive, "Providence vaccine proposal centers on cancer-fighting technique," 31 Mar. 2020 In only three days over 100 plasmid requests had been distributed by Addgene! Sharon Begley, STAT, "You had questions for David Liu about CRISPR, prime editing, and advice to young scientists. He has answers," 6 Nov. 2019 And the bacterial bits included a few genes for antibiotic resistance commonly found in plasmids. Megan Molteni, WIRED, "Brazil's Plans for Gene-Edited Cows Got Scrapped—Here's Why," 26 Aug. 2019 That means that Buri's genome contains the entire DNA sequence of the plasmid. Beth Mole, Ars Technica, "Part cow, part… bacterium? Biotech company makes heifer of gene-editing blunder," 1 Sep. 2019 The genes that code for the antigen variants are stored on several plasmids, strands of DNA that can replicate or move around separately from the bacteria's chromosome. Kiona N. Smith, Ars Technica, "Ancient DNA reveals the secrets of a devastating European disease," 26 Sep. 2018 But compared to modern African strains, the medieval strain is missing copies of six loci, mostly at a particular site on some plasmids. Kiona N. Smith, Ars Technica, "Ancient DNA reveals the secrets of a devastating European disease," 26 Sep. 2018 The researchers found that S. typhi had gained more resistance genes by acquiring a plasmid, a circular piece of DNA, from another bacterium (a process known as horizontal gene transfer). The Economist, "A strain of typhoid could become virtually untreatable," 26 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'plasmid.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of plasmid

1952, in the meaning defined above

History and Etymology for plasmid

plasma + -id entry 2

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Time Traveler for plasmid

Time Traveler

The first known use of plasmid was in 1952

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Statistics for plasmid

Last Updated

8 Jun 2020

Cite this Entry

“Plasmid.” Dictionary, Merriam-Webster, Accessed 7 Aug. 2020.

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plas·​mid | \ ˈplaz-məd How to pronounce plasmid (audio) \

Medical Definition of plasmid

: an extrachromosomal ring of DNA that replicates autonomously and is found especially in bacteria — compare episome

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