| Acinus | |
|---|---|
 Normal histology of the breast, including an acinus in lower image. The terminal duct connected to the magnified acinus is not within this microsection. | |
 Centroacinar cells | |
| Identifiers | |
| TH | H2.00.02.0.03050 |
| Anatomical terminology | |
An acinus (/ˈæsɪnəs/; pl.: acini; adjective, acinar /ˈæsɪnər/ or acinous) refers to any cluster of cells that resembles a many-lobed "berry," such as a raspberry (acinus is Latin for "berry"). The berry-shaped termination of an exocrine gland, where the secretion is produced, is acinar in form, as is the alveolar sac containing multiple alveoli in the lungs.