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n. pl. ac·i·ni (-nī′)
One of the small saclike dilations composing a compound gland.

[Latin, berry.]

a·cin′ic (ə-sĭn′ĭk), ac′i·nous adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


n, pl -ni (-ˌnaɪ)
1. (Anatomy) anatomy any of the terminal saclike portions of a compound gland
2. (Botany) botany any of the small drupes that make up the fruit of the blackberry, raspberry, etc
3. botany obsolete a collection of berries, such as a bunch of grapes
[C18: New Latin, from Latin: grape, berry]
acinic, ˈacinous, ˈacinose adj
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈæs ə nəs)

n., pl. -ni (-ˌnaɪ)
1. a small, rounded form, as a lobule, sac, seed, or berry.
2. the smallest secreting portion of a gland.
[1725–35; < Latin: grape, berry, seed of a berry]
ac′i•nar (-nər, -ˌnɑr) a•cin•ic (əˈsɪn ɪk) adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.acinus - one of the small drupes making up an aggregate or multiple fruit like a blackberryacinus - one of the small drupes making up an aggregate or multiple fruit like a blackberry
drupelet - a small part of an aggregate fruit that resembles a drupe
2.acinus - one of the small sacs or saclike dilations in a compound glandacinus - one of the small sacs or saclike dilations in a compound gland
gland, secreter, secretor, secretory organ - any of various organs that synthesize substances needed by the body and release it through ducts or directly into the bloodstream
sac - a structure resembling a bag in an animal
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Idas modiolaeformis specimens display both male and female acini simultaneously, although all specimens except one displayed only male or female gametes.
In previous studies, Furuta and collaborators have shown that conditioned-medium, taken from normal mammary epithelial cells while in the process of forming acini in a 3D lamin-rich extracellular matrix culture, can revert the malignant phenotype of breast cancer cells so that they behave as if they were normal breast cells.
AQP-5 appeared mainly at the apical membrane of mucous glands, basolateral membrane and basal membrane of serous acini. There was intense staining in the intercalated duct, striated duct, and secretory duct of the labial gland (Fig.
The mammary gland contained numerous small acini with small amounts of milk in the acini and ducts.
Hartmann, head of the Mayo Clinic's benign breast disease study team, said that in order to standardize assessment of lobular involution and make it faster and more clinically practical, she and her colleagues have developed a quantitative involution measure based upon computerized calculation of lobular area and the number of acini per lobular unit.
(1) The characteristic histological features are those of a stroma-poor cellular tumour composed of sheets and small glands (acini) comprising polygonal atypical cells with prominent nucleoli.
Experiments show that 5000 cells/ chamber of human mammary epithelial cell lines (MCF10A) in chamber slide is optimal for the 3D formation of acini morphology or mammosphere during 20 days.
The prostatic acini affected by PIN showed a remarkable enlargement of the epithelial layer with pseudostratification and crowding of the nuclei in comparison with normal acini from controls.
Whereas early work had predominantly focused on the effects of alcohol on the muscle at the surface of the first part of the small intestine (i.e., duodenum), which controls secretions from the liver, pancreas, and gallbladder into the duodenum (i.e., the sphincter of Oddi), and on the pancreatic ducts (see Figure 1), attention has shifted over the past decade to the influence of alcohol on the clusters of secretory cells (i.e., acini) that produce pancreatic juice containing digestive enzymes.
The bulk of pancreatic tissue is made up of grapelike clusters of cells (acini), which produce potent, acidic digestive enzymes and secrete them through ducts into the duodenum.
These results indicate that the pancreatic acini are target tissues for dioxin and certain dioxin-like compounds.
For spermatogenesis, cells were identified and counted if they touched the X axis of an eyepiece reticule that was moved across the approximate center of 10 acini (i.e., epithelial sacs within the visceral mass where gametogenesis occurs) per male specimen using a light microscope and 1000x magnification.