Ascus
Ascus explained in an easy to understand way:
Imagine trying to fit all your groceries into a single shopping bag without anything falling out. Just like that shopping bag holds and organizes your items, an ascus is a saclike structure in ascomycete fungi that contains and produces ascospores. In this analogy, the shopping bag is the ascus, and the groceries are the ascospores, both serving as containers to organize and transport essential items.
Practice Version
Ascus: Saclike structures in ascomycete fungi that produce ascospores. Ascus. An ascus is a special sac in certain fungi where spores form for reproduction.