Definition of "apsidal" []

• Of or relating to an apse. (adjective)
• Of or relating to an apsis. (adjective)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "This kind of apsidal (or elsewhere even oval structures) houses ideal for thatched roofs were especially quite common during the Geometric Period (e.g. in the oldest Greek colonies at Old-Smyrna, Miletos, Ephesos; in many sanctuaries or houses on the Greek mainland, such as at Eretria, Perachora, etc)."
• "Already on the second day we discovered in the topsoil a kind of apsidal wall, suggesting that Room IL was a twin of the apsidal reception/dining hall L on the upper floor of Room XLVI."
• "It is filled with all manner of recondite symbolism and extravagant touches, such as a great organ, a choir organ split up between the two towers, and at least eight or nine lesser organs placed over the entrances to the apsidal and even the nave chapels."