Meaning

noun a strain of bacteria that is resistant to all antibiotics

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

originEtymology tree Proto-Indo-European *úp Proto-Indo-European *-er Proto-Indo-European *upér Proto-Italic *super Latin super Latin super-lbor. English super- English bug English superbug From super- + bug.

Etymology from Wiktionary, CC BY-SA 3.0