Noun Acinus Definition and Examples







A small sac-like cavity in a gland, surrounded by secretory cells.
  1. 'The lesion displayed unremarkable pancreatic lobules with acini, ducts, and islets of Langerhans cells.'
  2. 'The mass also contained cystic spaces lined by columnar epithelium, sebaceous glands, cartilage, smooth muscle, and pancreatic acini.'
A region of the lung supplied with air from one of the terminal bronchioles.
  1. 'Panlobular emphysema, also referred to as panacinar emphysema, affects the acinus of the entire secondary lobule.'
  2. 'Emphysema is classified into three subtypes based on the portion of the acinus that is involved.'
((n.) One of the small grains or drupelets which make up some kinds of fruit, as the blackberry, raspberry, etc.|--|(n.) A grapestone.|--|(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.|--|)

Mid 18th century: Latin, literally ‘a kernel’.

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