acinus

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acinus

 [as´ĭ-nus] (pl. a´cini) (L.)
any of the smallest lobules of a compound gland.
liver acinus the smallest functional unit of the liver, a mass of liver parenchyma that is supplied by terminal branches of the portal vein and hepatic artery and drained by a terminal branch of the bile duct.
 Liver acinus: Hepatic lobules are represented by hexagons (solid lines); liver acinus is represented by rhombus (dotted line). From Dorland's, 2000.
pulmonary acinus terminal respiratory unit.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ac·i·nus

, gen. and pl.

ac·i·ni

(as'i-nŭs, -nī), [MIM*604562]
One of the minute grape-shaped secretory portions of an acinous gland. Some authorities use the terms acinus and alveolus interchangeably, whereas others differentiate them by the constricted openings of the acinus into the excretory duct.
[L. berry, grape]
Farlex Partner Medical Dictionary © Farlex 2012

acinus

(ăs′ə-nəs)
n. pl. aci·ni (-nī′)
One of the small saclike dilations composing a compound gland.

a·cin′ic (ə-sĭn′ĭk), ac′i·nous adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

acinus

A small, sac-like out-pouching of a compound gland, as in the breast, pancreas, salivary glands and thyroid.

Lung
A sub-segmental lung structure which, with the primary pulmonary lobule, is the smallest unit of lung tissue. It consists of a terminal bronchiole and the lung parenchyma that arises from it.

Acinus

A subsegmental lung structure which, with the primary pulmonary lobule, is the smallest unit of lung tissue. It consists of a terminal bronchiole and the lung parenchyma that arises from it
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

ac·i·nus

, pl. acini (as'i-nŭs, -nī) [TA]
One of the minute grape-shaped secretory portions of an acinous gland. Some authorities use the terms acinus and alveolus interchangeably, whereas others differentiate them by the constricted openings of the acinus into the excretory duct.
[L. berry, grape]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

acinus

1. The part of the air passage of the lung beyond each of the smallest (terminal) bronchioles. There are about 12,000 acini in each lung. The lung ALVEOLI arise from the acini.
2. Any terminal sac-like process of a compound gland.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005

acinus

the terminal sac of an alveolar gland. The gland has a multicellular structure with sac-shaped secreting units. In the pancreas, acinar cells secrete the PANCREATIC JUICE.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

ac·i·nus

, pl. acini (as'i-nŭs, -nī) [TA] [MIM*604562]
One of the minute grape-shaped secretory portions of an acinous gland.
[L. berry, grape]
Medical Dictionary for the Dental Professions © Farlex 2012