Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

exon

play
noun ex·on \ˈek-ˌsän\

Definition of exon

  1. :  a polynucleotide sequence in a nucleic acid that codes information for protein synthesis and that is copied and spliced together with other such sequences to form messenger RNA — compare intron

exonic

play \ek-ˈsä-nik\ adjective


Origin and Etymology of exon

expressed sequence + 2-on


First Known Use: circa 1978


Medical Dictionary

exon

play
noun ex·on \ˈek-ˌsän\

Medical Definition of exon

  1. :  a polynucleotide sequence in a nucleic acid that codes information for protein synthesis and that is copied and spliced together with other such sequences to form messenger RNA—compare intron

exonic

\ek-ˈsän-ik\play adjective



Learn More about exon


Seen and Heard

What made you want to look up exon? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to make consistent or congruous

Get Word of the Day daily email!

WORD GAMES

Take a 3-minute break and test your skills!

alphabet-pasta-spelling-help

Which is the correct spelling?

acommadate acommodate accomodate accommodate
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ