How do you spell Acini

Available Definitions:
1)  n. - One of the small grains or drupelets which make up some kinds of fruit, as the blackberry, raspberry, etc.
2)  n. - A grapestone.
3)  n. - 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.