Apollyon

Boyd’s Bible Dictionary:

(destroyer). Greek name of Abaddon, “angel of the bottomless pit” (Rev. 9:11). [ABADDON.]

Concise Bible Dictionary:

The Greek translation of the Hebrew name ABADDON, which signifies “destroyer.” He is king of the locusts of the bottomless pit, and ruler over the destroying agents that proceed from thence: it is one of the characters of Satan (Rev. 9:11).

Strong’s Dictionary of Greek Words:

Number:

623 (find all occurrences in KJV Bible)

Greek:

Ἀπολλύων

Transliteration:

Apolluon

Phonic:

ap-ol-loo’-ohn

Meaning:

active participle of 622; a destroyer (i.e. Satan)

KJV Usage:

Apollyon

Jackson’s Dictionary of Scripture Proper Names:

destroyer

Potts’ Bible Proper Names:

A destroyer, i. e., Satan:― "the angel of the bottomless pit" [ABADDON], Rev. 9:11. {Apollyon}