intron

intron

[in-tron]
noun Genetics.
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.
Also called intervening sequence.
Compare exon2.


Origin:
1975–80; perhaps intr(o)- + -on1

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World English Dictionary
intron (ˈɪntrɒn)
 
n
biochem Compare exon a stretch of DNA that interrupts a gene and does not contribute to the specification of a protein
 
[C20: from intr(agenic) (regi)on]

Collins English Dictionary - Complete & Unabridged 10th Edition
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American Heritage
Medical Dictionary

intron in·tron (ĭn'trŏn)
n.
A segment of a gene situated between exons that does not function in coding for protein synthesis.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
intron   (ĭn'trŏn)  Pronunciation Key 
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary

intron definition


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.)

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