Relating to or resembling a disk or circular disk-shaped structure.
From Latin 'discus' (disk, from Greek diskos), plus '-al' (relating to). Medical and biological terminology adopted this Latinate formation.
Biologists use 'discal' to describe the flat, round parts of jellyfish, insect wings, and plant structures—it's a word that stayed in scientific use even as everyday Latin-derived words were replaced.
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