1. a flask-shaped fruiting body containing asci, found in certain fungi
Usage: botanical; mycological

Examples

• The perithecium develops as a protective structure around the reproductive organs of the fungus.
• Scientists examined the perithecium under a microscope to identify the fungal species.
• Each perithecium contains numerous asci filled with spores.
• The black dots on the infected plant tissue were actually perithecia.
• Researchers collected samples to study the perithecium formation in laboratory conditions.