Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A codon, AUG in eukaryotes and either GUG or UUG in bacteria, that signals the initiation of translation and the first amino acid in a polypeptide chain.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun The codon at which translation of mRNA into protein starts, encoding the first amino acid.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

start (indicating first, initial) + codon

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