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The Collaborative International Dictionary
Acini

Acinus \Ac"i*nus\ ([a^]s"[i^]*n[u^]s), n.; pl. Acini. [L., grape, grapestone.]

  1. (Bot.)

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

    2. 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. [1913 Webster] ||

Wiktionary
acini

n. (en-irregular plural of: acinus)

WordNet
acinus
  1. n. one of the small drupes making up an aggregate or multiple fruit like a blackberry

  2. one of the small sacs or saclike dilations in a compound gland

  3. [also: acini (pl)]

acini

See acinus