Seleucid /səˈluːsɪd/adjective 1noun 1forms 3 adjective1 •Relating to the Greek-Macedonian dynasty which ruled (312–63 BCE) an empire created by Seleucus out of the eastern conquests of Alexander the Great.The Seleucid and Dendera Zodiacs are illustrations of the pictograph tradition from the 5th phase, showing the zodiac plus the four ‘parazodiacal’ animals (crow, serpent, eagle, and southern fish). — 1998 noun1 •A member of this dynasty. formsSeleucidae · Seleucides · Seleucids