There are 2 definitions of exon in English:

exon1

Syllabification: ex·on
Pronunciation: /ˈeksän
 
/

noun

Biochemistry
A segment of a DNA or RNA molecule containing information coding for a protein or peptide sequence. Compare with intron.
More example sentences
  • All of them contained usually short fragments of coding sequences corresponding to exons of single-copy genes.
  • Sequence data for each gene encompassed all coding exons and the intervening introns.
  • He concluded that recombination had separated the genealogical histories of introns and exons within these genes.

Origin

late 20th century: from expressed (see express1) + -on.

Derivatives

exonic

adjective
More example sentences
  • Homology of the exonic nucleotide sequence with human and murine sequences is high (89% and 85% sequence identity, respectively).
  • Most of the exonic nucleotide changes are silent third-position changes.
  • In each case, a highly conserved region was found in the intron downstream of the editing site and this region was shown to be complementary to the region of the exonic editing site.

Definition of exon in:

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Word of the day flippant
Pronunciation: ˈflipənt
adjective
not showing a serious or respectful attitude

There are 2 definitions of exon in English:

exon2

Line breaks: exon
Pronunciation: /ˈɛksɒn/

Entry from British & World English dictionary

noun

British
Each of the four officers acting as commanders of the Yeomen of the Guard.

Origin

mid 18th century: representing the pronunciation of French exempt 'free from', from Latin exempt- 'taken out', from the verb eximere, so named because these officers were exempt from normal duties.

Definition of exon in:

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Word of the day flippant
Pronunciation: ˈflipənt
adjective
not showing a serious or respectful attitude