Boyd’s Bible Dictionary:
(boils). The ulcerous inflammations which constituted the sixth Egyptian plague (Ex. 9:9-11; Deut. 28:27,35).
Concise Bible Dictionary:
Inflamed ulcers on the body, as from boils, on the Egyptians and the magicians in the sixth plague (Ex. 9:9-10).
Strong’s Dictionary of Hebrew Words:
Transliteration:
’aba`bu`ah
Meaning:
(by reduplication) from an unused root (meaning to belch forth); an inflammatory pustule (as eruption)