Definition of ACINUS

• one of the small drupelets or berries of an aggregate, baccate fruit, as the blackberry
• berry, as a grape or currant
• a. minute rounded lobule b. the smallest secreting portion of a gland
• a small sacklike division of a gland [n ACINI]
• a small, saclike division of a gland [n ACINI] : ACINAR [adj], ACINIC [adj], ACINIFORM [adj], ACINOSE [adj], ACINOUS [adj]