The Collaborative International Dictionary
ocher mutation
ocher mutation \o"cher mu"tation\ n. [A humorous variation on the term amber mutation.] (Microbiology, Molecular biology) A mutation in which the base sequence of one of the codons in the messenger RNA has been converted to UAA. Such a mutation may be conditionally suppressed, as can an amber mutation, by the presence of a special transfer RNA. -- ocher mutant, n.