exon

[ ek-son ]

/ ˈɛk sɒn /

noun

(in Britain) one of four yeomen of the guard who act as commanding officers in the absence of higher authority.

Also called exempt.

Origin of exon

1645–55; earlier exant, for French exempt (spelling altered to show French pronunciation)

Words nearby exon

exogenous, exogenous fiber, exogenous hyperglyceridemia, exome, exomphalos, exon, exonarthex, exonerate, exoneration, exonuclease, exonumia

Definition for exon (2 of 2)

exon²

[ ek-son ]

/ ˈɛk sɒn /

noun Genetics.

any portion of an interrupted gene that is represented in the RNA product and is translated into protein.

Compare intron.

Origin of exon

1975–80; ex(pressed sequence) + -on¹

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for exon

He soon returned, accompanied by an exon of the short robe, named Larchier.
A Popular History of France From The Earliest Times|Francois Pierre Guillaume Guizot
Anno Domini 166, the deane of Exon dyed, and then it was his right to step-in next to the deanry.
Brief Lives (Vol. 2 of 2)|John Aubrey
Exon, eks′on, n. one of the four officers of the yeomen of the Royal Guard.
Chambers's Twentieth Century Dictionary (part 2 of 4: E-M)|Various
I do not believe that there could be found under heaven another man like this exon.
A Popular History of France From The Earliest Times|Francois Pierre Guillaume Guizot

The exon looked all round the room; he knew every one of the magistrates; the accused were sitting right in front of him.
A Popular History of France From The Earliest Times|Francois Pierre Guillaume Guizot

British Dictionary definitions for exon (1 of 2)

exon¹

/ (ˈɛksɒn) /

noun

British one of the four officers who command the Yeomen of the Guard

Word Origin for exon

C17: a pronunciation spelling of French exempt exempt

British Dictionary definitions for exon (2 of 2)

exon²

/ (ˈɛksɒn) /

noun

any segment of a discontinuous gene the segments of which are separated by intronsCompare intron

Derived forms of exon

exonic, adjective

Word Origin for exon

C20: from ex- 1 + -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

Cultural definitions for exon

exon

Stretches of DNA in genes that code for proteins. In eukaryotes, exons in a given gene are generally separated from each other by stretches of DNA that do not contain instructions for constructing proteins. (Compare intron.)

Medical definitions for exon

exon

[ ĕk′sŏn ]

n.

A nucleotide sequence in DNA that carries the code for the final mRNA molecule and thus defines a protein's amino acid sequence.coding sequence

Other words from exon

ex•on′ic adj.

Scientific definitions for exon

exon

[ ĕk′sŏn ]

A segment of a gene that contains information used in coding for protein synthesis. Genetic information within genes is discontinuous, split among the exons that encode for messenger RNA and absent from the DNA sequences in between, which are called introns. Genetic splicing, catalyzed by enzymes, results in the final version of messenger RNA, which contains only genetic information from the exons. Compare intron.

单词	exon
释义	exon ¹ [ ek-son ] / ˈɛk sɒn / noun (in Britain) one of four yeomen of the guard who act as commanding officers in the absence of higher authority. Also called exempt. Origin of exon ¹ 1645–55; earlier exant, for French exempt (spelling altered to show French pronunciation) Words nearby exon exogenous, exogenous fiber, exogenous hyperglyceridemia, exome, exomphalos, exon, exonarthex, exonerate, exoneration, exonuclease, exonumia Definition for exon (2 of 2) exon² [ ek-son ] / ˈɛk sɒn / noun Genetics. any portion of an interrupted gene that is represented in the RNA product and is translated into protein. Compare intron. Origin of exon ² 1975–80; ex(pressed sequence) + -on¹ Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for exon He soon returned, accompanied by an exon of the short robe, named Larchier. A Popular History of France From The Earliest Times\|Francois Pierre Guillaume Guizot Anno Domini 166, the deane of Exon dyed, and then it was his right to step-in next to the deanry. Brief Lives (Vol. 2 of 2)\|John Aubrey Exon, eks′on, n. one of the four officers of the yeomen of the Royal Guard. Chambers's Twentieth Century Dictionary (part 2 of 4: E-M)\|Various I do not believe that there could be found under heaven another man like this exon. A Popular History of France From The Earliest Times\|Francois Pierre Guillaume Guizot The exon looked all round the room; he knew every one of the magistrates; the accused were sitting right in front of him. A Popular History of France From The Earliest Times\|Francois Pierre Guillaume Guizot British Dictionary definitions for exon (1 of 2) exon¹ / (ˈɛksɒn) / noun British one of the four officers who command the Yeomen of the Guard Word Origin for exon C17: a pronunciation spelling of French exempt exempt British Dictionary definitions for exon (2 of 2) exon² / (ˈɛksɒn) / noun any segment of a discontinuous gene the segments of which are separated by intronsCompare intron Derived forms of exon exonic, adjective Word Origin for exon C20: from ex- 1 + -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 Cultural definitions for exon exon Stretches of DNA in genes that code for proteins. In eukaryotes, exons in a given gene are generally separated from each other by stretches of DNA that do not contain instructions for constructing proteins. (Compare intron.) 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. Medical definitions for exon exon [ ĕk′sŏn ] n. A nucleotide sequence in DNA that carries the code for the final mRNA molecule and thus defines a protein's amino acid sequence.coding sequence Other words from exon ex•on′ic adj. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for exon exon [ ĕk′sŏn ] A segment of a gene that contains information used in coding for protein synthesis. Genetic information within genes is discontinuous, split among the exons that encode for messenger RNA and absent from the DNA sequences in between, which are called introns. Genetic splicing, catalyzed by enzymes, results in the final version of messenger RNA, which contains only genetic information from the exons. Compare intron. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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