Strong's #2070: zbuwb (pronounced zeb-oob')

from an unused root (meaning to flit); a fly (especially one of a stinging nature):--fly.

Brown-Driver-Briggs Hebrew Lexicon:

ּ

zebûb

1) fly

Part of Speech: noun masculine

Relation: from an unused root (meaning to flit)

Usage:

This word is used 2 times:

 

Ecclesiastes 10:1: "Dead flies cause the ointment of the apothecary to send forth a stinking savor: so doth a little folly"
Isaiah 7:18: "day, that the LORD shall hiss for the fly that is in the uttermost part of the rivers of Egypt,"