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n. pl. ac·a·ri (-rī′)
A mite, especially one of the genus Acarus.

[New Latin Acarus; see acarid.]
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 -ri (-ˌraɪ)
(Animals) any of the free-living mites of the widely distributed genus Acarus, several of which, esp A. siro, are serious pests of stored flour, grain, etc
[C17: New Latin, from Greek akari a small thing, a mite]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈæk ər əs)

n., pl. -a•ri (-əˌraɪ)
a mite, esp. of the genus Acarus.
[1650–60; < New Latin < Greek ákari mite]
ac′a•roid`, 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.acarus - any of several mites of the order Acarinaacarus - any of several mites of the order Acarina
Acarina, order Acarina - mites and ticks
mite - any of numerous very small to minute arachnids often infesting animals or plants or stored foods
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Species of the mites found were Acarus siro (34.6%), Glycyphagus domesticus (22.8%), Tyrophagus putrescentiae (16.8%), Tyrophagus spp.
destructor, Blomia tropicalis, Acarus siro and Tyrophagus putrescentiae) and B.
Cheesemakers say the flavour is down to the beasties - the Acarus siro mite - shedding their skins within the cheese and laying their eggs.