Ctes·i·phon (t?s??-f?n?, t??s?-) 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.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.Ctesiphon (?t?s??f?n) n (Placename) an ancient city on the River Tigris about 100 km (60 miles) above Babylon. First mentioned in 221 bc, it was destroyed in the 7th and 8th centuries adCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014Ctes?i?phon (?t?s ??f?n) n. a ruined city in Iraq, on the Tigris, near Baghdad: an ancient capital of Parthia. Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.