acini

Noun

acinus (plural acini)

1. One of the small grains or drupelets which make up some kinds of fruit, as the blackberry, raspberry, etc.
2. A grape-stone.
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.
   • Their smallest lobules were called acini, a term which has also been used to denote the saccular recesses in the lobules […]1828, Jones Quain, Quain's elements of anatomy