from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Either of two codons, AUG or GUG, that signal the initiation of translation and the first amino acid in a polypeptide chain. Also called chain initiation codon.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The codon at which translation of mRNA into protein starts, encoding the first amino acid.
start (indicating first, initial) + codon (Wiktionary)