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intron

[in-tron]
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noun Genetics.
  1. a noncoding segment in a length of DNA that interrupts a gene-coding sequence or nontranslated sequence, the corresponding segment being removed from the RNA copy before transcription.
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Compare exon2.

Origin of intron

1975–80; perhaps intr(o)- + -on1
Also called intervening sequence.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for intron

intron

noun
  1. biochem a stretch of DNA that interrupts a gene and does not contribute to the specification of a proteinCompare exon 2
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Word Origin

C20: from intr (agenic) (regi) on
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for intron

1978, from intragenic + -on.

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Online Etymology Dictionary, © 2010 Douglas Harper

intron in Medicine

intron

(ĭntrŏn)
n.
  1. A segment of a gene situated between exons that does not function in coding for protein synthesis.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

intron in Science

intron

[ĭntrŏn]
  1. A segment of a gene situated between exons that does not function in coding for protein synthesis. After transcription of a gene to messenger RNA, the transcriptions of introns are removed, and the exons are spliced together by enzymes before translation and assembly of amino acids into proteins. Compare exon.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

intron in Culture

intron

A stretch of DNA in a gene that does not code for proteins. In eukaryotes, introns in a given gene separate stretches of DNA that contain instructions for constructing proteins. (Compare exon.)

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The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.