1: δράκων
(Strong's #1404 — Noun Masculine — drakon — drak'-own )

denoted "a mythical monster, a dragon;" also a large serpent, so called because of its keen power of sight (from a root derk, signifying "to see"). Twelve times in the Apocalypse it is used of the Devil, 12:3,4,7,9,13,16,17; 13:2,4,11; 16:13; 20:2.