1. relating to or having the form of an apse
Usage: architecture
2. relating to an apsis or the apsides of an orbital path
Usage: astronomy

Examples

• The cathedral’s apsidal chapel contained beautiful stained glass windows.
• The church featured an apsidal east end typical of Romanesque architecture.
• Astronomers studied the apsidal motion of the planet’s elliptical orbit.
• The apsidal precession affects the timing of seasonal changes over long periods.
• The Byzantine church had three apsidal chambers behind the altar.
• Scientists calculated the apsidal advance of Mercury’s orbit around the sun.