The American Heritage® Dictionary of the English Language, 4th Edition
n. A unit of genetic material that functions in a coordinated manner by means of an operator, a promoter, and one or more structural genes that are transcribed together.
n. 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.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a segment of DNA containing adjacent genes including structural genes and an operator gene and a regulatory gene
Word Usage
"In at least one case, IS elements activate an operon during starvation only if the substrate for that operon is present in the environment. (emphasis mine)"