Definition of codon in English:


Syllabification: co·don
Pronunciation: /ˈkōˌdän


  • A sequence of three nucleotides that together form a unit of genetic code in a DNA or RNA molecule.
    More example sentences
    • 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.


1960s: from code + -on.

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