1. One of the small drupes making up an aggregate or multiple fruit like a blackberry
   "Each acinus of the blackberry was juicy and sweet"
    
2. One of the small sacs or saclike dilations in a compound gland
   "The acini of the pancreas produce digestive enzymes"

Derived forms: acini

Type of: drupelet, sac

Part of: gland, secretor, secretory organ

Encyclopedia: Acinus