Definitions for operonˈɒp əˌrɒn
Random House Webster's College Dictionary
a set of two or more adjacent cistrons whose transcription is under the coordinated control of a promoter, an operator, and a regulator gene.
Origin of operon:
< F opéron (1960), der. of opérer to work
a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene
A unit of genetic material that functions in a coordinated manner by means of an operator, a promoter, and structural genes that are transcribed together.
U.S. National Library of Medicine
In bacteria, a group of metabolically related genes, with a common promoter, whose transcription into a single polycistronic MESSENGER RNA is under the control of an OPERATOR REGION.