opal codon

um·ber co·don

the termination codon UGA.
Synonym(s): opal codon

um·ber co·don

(um'bĕr kō'don)
The termination codon UGA.
Synonym(s): opal codon.

opal codon

one of the three NONSENSE CODONS in the GENETIC CODE, consisting of the mRNA bases UGA.