Definition of codon in English:


Pronunciation /ˈkōdän/ /ˈkoʊdɑn/


  • A sequence of three nucleotides which together form a unit of genetic code in a DNA or RNA molecule.

    ‘Biochemistry may explain why most of the exceptions to the genetic code involve stop codons.’
    • ‘In effect, the DNA blueprint is a succession of code words, each consisting of a set of three nucleotides, known as codons, in the gene.’
    • ‘Due to the redundant nature of codons, the genetic code shows a significant level of neutrality.’
    • ‘An organism is defined through the set of preferred codons shaping its genome.’
    • ‘We split the observable changes in the aligned codons in the two sequences into a number of disjoint groups.’


1960s from code+ -on.