from The American Heritage® Dictionary of the English Language, 4th Edition
- An ancient city of central Iraq on the Tigris River southeast of Baghdad. As the residence of Parthian kings it was renowned for its splendor. The Arabs captured and plundered the city in 637.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. Ancient ruined city on the Tigris, near Baghdad, in present-day Iraq. Capital of Parthia and later of Sassanid Empire. Abandoned in 7th and 8th centuries.
From Latin Ctēsiphōn, from Ancient Greek Κτησιφῶν (Ktēsiphōn). (Wiktionary)