Acinus

Origin

From Latin acinus ("grape, grape-stone").

Full definition of acinus

Noun

1. (botany) One of the small grains or drupelets which make up some kinds of fruit, as the blackberry, raspberry, etc.
2. (botany) A grape-stone.
3. (anatomy) 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. - Richard Quain.