Medical Definition of Codon
Codon: A set of any three adjacent bases in DNA or RNA. There are 64 different codons, of which 61 specify the incorporation of an amino acid into a polypeptide chain; the remaining 3 are stop codons, which signal the ends of polypeptides.
Last Editorial Review: 6/9/2016
Back to MedTerms online medical dictionary A-Z List
Need help identifying pills and medications?