1. Plural of acervulus; small, flask-shaped or cushion-like fruiting bodies produced by certain fungi, especially plant pathogens, that contain spores.
Usage: mycology; botany; technical

Examples

• The fungal acervuli were visible under the microscope as tiny dark structures on the leaf surface.
• Plant pathologists identified acervuli of the anthracnose fungus on the infected fruit.
• The acervuli release spores that spread the disease to nearby plants.
• Under magnification, the acervuli appeared as small, gelatinous cushions embedded in the host tissue.