1. In lichenology, the outer rim or border of a lichen apothecium (the fruiting body), typically composed of fungal tissue.
Usage: technical; biology; mycology

Examples

• The exciple of the lichen apothecium was clearly visible under the microscope.
• Lichenologists examine the exciple to help classify different lichen species.
• The dark exciple contrasted sharply with the lighter disc of the apothecium.
• Some lichens have a prominent exciple, while others have a reduced or absent one.