from The American Heritage® Dictionary of the English Language, 4th Edition
- An ancient city of Mesopotamia on the Tigris River south-southeast of modern Baghdad. Founded c. 300 B.C., it was an important commercial center and the chief city of the empire founded by Seleucus I.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. the name of a number of cities founded by kings of the Seleucid dynasty, the most famous being Seleucia on the Tigris
From Ancient Greek Σελεύκεια (Seleukeia). (Wiktionary)