Acinus

Part of speech: noun (n.)

1. One of the small grains or drupelets which make up some kinds of fruit, as the blackberry, raspberry, etc.

2. A grapestone.

3. One of the granular masses which constitute a racemose or compound gland, as the pancreas; also, one of the saccular recesses in the lobules of a racemose gland. Quain.