[ as-uh-nuhs ]

noun,plural ac·i·ni [as-uh-nahy]. /ˈæs əˌnaɪ/.
  1. Botany. one of the small drupelets or berries of an aggregate, baccate fruit, as the blackberry.

  2. a berry, as a grape or currant.

  1. Anatomy.

    • a minute rounded lobule.

    • the smallest secreting portion of a gland.

Origin of acinus

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

Other words from acinus

  • 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. 2023

How to use acinus in a sentence

  • The centres of the acini showed parenchymatous and fatty degeneration.

    Plague | Thomas Wright Jackson
  • Acini: granulations, like those on a blackberry: the terminal secreting tubes of glands.

  • The liver was softer than natural, and exhibited a notable yellowishness in the centre of the acini.

    Poisons: Their Effects and Detection | Alexander Wynter Blyth
  • The organ showed prominent structure, the centres of the acini being red, the periphery lighter in color.

    Plague | Thomas Wright Jackson
  • The cells on the periphery of the acini exhibited typical fatty infiltration.

    Plague | Thomas Wright Jackson

British Dictionary definitions for acinus


/ (ˈæsɪnəs) /

nounplural -ni (-ˌnaɪ)
  1. anatomy any of the terminal saclike portions of a compound gland

  2. botany any of the small drupes that make up the fruit of the blackberry, raspberry, etc

  1. botany obsolete a collection of berries, such as a bunch of grapes

Origin of acinus

C18: New Latin, from Latin: grape, berry

Derived forms of acinus

  • acinic (əˈsɪnɪk), acinous or acinose, adjective

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