1. Plural of ascus; sac-like structures in fungi that contain spores.
Usage: biology; mycology

Examples

• The asci of the cup fungus release spores when mature.
• Under the microscope, the asci appeared as elongated sacs filled with ascospores.
• Ascomycetes are fungi characterized by the presence of asci.
• The asci burst open to disperse their spores into the air.