intron

noun
in·tron | \ˈin-ˌträn \

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, "A battle between the sexes in a single gene," 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, "The future is here: Genetically engineered stem cells save a patient," 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, "A Biotech Evangelist Seeks a Zika Dividend," 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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Time Traveler for intron

The first known use of intron was in 1978

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More Definitions for intron

intron

noun
in·tron | \ˈin-ˌträn \

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 \ adjective

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See words that rhyme with intron

Britannica.com: Encyclopedia article about intron

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