intron

noun
in·​tron | \ ˈin-ˌträn How to pronounce intron (audio) \

Definition of intron

: a polynucleotide sequence in a nucleic acid that does not code information for protein synthesis and is removed before translation of messenger RNA — compare exon

Examples of intron in a Sentence

Recent Examples on the Web There are now about a dozen individual changes in the amino acids used to make the protein, and the nearby DNA has picked up both an insertion (an intron) and several deletions. John Timmer, Ars Technica, 23 Feb. 2018 There are now about a dozen individual changes in the amino acids used to make the protein, and the nearby DNA has picked up both an insertion (an intron) and several deletions. John Timmer, Ars Technica, 23 Feb. 2018 Forty percent of these sites, however, were in between genes; another 47 percent were in introns, parts of a gene that aren't used to encode a protein. John Timmer, Ars Technica, 8 Nov. 2017 Named for parts of genes called introns and exons, Intrexon was founded in 1998 by Thomas D. Reed and his wife, Jackie, to supply DNA constructs for research with genetically engineered mice. Andrew Pollack, New York Times, 5 Mar. 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'intron.' 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 intron

1978, in the meaning defined above

History and Etymology for intron

intervening sequence + -on entry 2

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Cite this Entry

“Intron.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/intron. Accessed 25 Jul. 2021.

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More Definitions for intron

intron

noun
in·​tron | \ ˈin-ˌträn How to pronounce intron (audio) \

Medical Definition of intron

: a polynucleotide sequence in a nucleic acid that does not code information for protein synthesis and is removed before translation of messenger RNA — compare exon

Other Words from intron

intronic \ in-​ˈträn-​ik How to pronounce intron (audio) \ adjective

More from Merriam-Webster on intron

Britannica.com: Encyclopedia article about intron

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