noun.
A strain of bacteria that has become resistant to many antibiotics.
noun.
An insect, Bemisia tabaci, that is a serious pest.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a strain of pest accidentally imported into Florida from the Middle East then spread to California where it is a very serious pest feeding on almost all vegetable crops and poinsettias
noun.
a strain of bacteria that is resistant to all antibiotics
Word Usage
"They were victims of a scary "superbug" - a bacterial staph infection for which there is now no known cure."