Strong's Definition
from an unused root (meaning to flit); a fly (especially one of a stinging nature)
KJV Usage: fly
STEPBible — Tyndale Abridged Hebrew Lexicon
זְבוּב (ze.vuv) — fly. fly
UBS Dictionary of Biblical Hebrew
UBS Dictionary of Biblical Hebrew © United Bible Societies, licensed CC BY-SA 4.0.
Brown-Driver-Briggs Hebrew Lexicon
זְבוּב n.m. fly (as moving to and fro in the air?);—lit. only Ec 10:1 i.e. dead flies ref