Relating to or shaped like an apse, the semicircular end of a church.
Derived from 'apsid' or 'apse' (Latin 'apsis') plus the suffix '-al' meaning 'of or pertaining to.' This adjective form emerged in architectural and ecclesiastical English.
When architects describe an 'apsidal end,' they're using a term that directly connects back to Roman basilicas—the Romans figured out that curved spaces were perfect for important civic and religious buildings.
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