Ac"i*nus (#), n.; pl. Acini (#). [L., grape, grapestone.]
1. Bot. (a)
One of the small grains or drupelets which make up some kinds of fruit, as the blackberry, raspberry, etc.
(b)
A grapestone.
2. Anat.
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.
© Webster 1913.