[ as-uh-nuh s ]
/ ˈæs ə nəs /

noun, plural ac·i·ni [as-uh-nahy] /ˈæs əˌnaɪ/.

Botany. one of the small drupelets or berries of an aggregate, baccate fruit, as the blackberry.
a berry, as a grape or currant.
  1. a minute rounded lobule.
  2. the smallest secreting portion of a gland.

Origin of acinus

1725–35; < Latin: grape, berry, seed of a berry

Related forms

ac·i·nar [as-uh-ner, -nahr] /ˈæs ə nər, -ˌnɑr/, a·cin·ic [uh-sin-ik] /əˈsɪn ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for acinus


/ (ˈæsɪnəs) /

noun plural -ni (-ˌnaɪ)

anatomy any of the terminal saclike portions of a compound gland
botany any of the small drupes that make up the fruit of the blackberry, raspberry, etc
botany obsolete a collection of berries, such as a bunch of grapes

Derived Forms

acinic (əˈsɪnɪk), acinous or acinose, adjective

Word Origin for acinus

C18: New Latin, from Latin: grape, berry
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for acinus


[ ăsə-nəs ]

n. pl. ac•i•ni (-nī′)

Any of several minute grape-shaped secretory portions of an acinous gland.

Related forms

a•cinic (ə-sĭnĭk) null null adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.