Apol'lyon. Apollyon or, as it is literally in the margin of the Authorized Version of Revelation 9:11, "a destroyer", is the rendering of the Hebrew word, Abaddon, "the angel of the bottomless pit". From the occurrence of the word in Psalms 88:11, the rabbins have made Abaddon, the nethermost of the two regions into which they divide the lower world; but that in Revelation 9:11, Abaddon is the angel and not the abyss, is perfectly evident in the Greek.
More than 4,500 subjects and proper names are defined and analyzed with corresponding Scripture references. Bible students have used "Smith's Bible Dictionary" since its introduction in the 1880s, making it a trustworthy classic.Wikipedia
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