| acinus | Origin: L, grape, grapestone. 1. <botany> One of the small grains or drupelets which make up some kinds of fruit, as the blackberry, raspberry, etc. A grapestone. 2. <anatomy> 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. Source: Websters Dictionary (01 Mar 1998) |
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| Rappaport's acinus | The smallest functional unit of the liver, comprising all of the liver parenchyma supplied by a terminal branch of the portal vein and hepatic artery; typically involves segments of two lobules lying between two terminal hepatic venules. Synonym: Rappaport's acinus. (05 Mar 2000) |
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| pulmonary acinus | The part of the airway consisting of a respiratory bronchiole and all of its branches. Synonym: primary pulmonary lobule, respiratory lobule. (05 Mar 2000) |
| liver acinus | The smallest functional unit of the liver, comprising all of the liver parenchyma supplied by a terminal branch of the portal vein and hepatic artery; typically involves segments of two lobules lying between two terminal hepatic venules. Synonym: Rappaport's acinus. (05 Mar 2000) |