ac·a·ri

[ak-uh-rahy]
noun
plural of acarus.
Dictionary.com Unabridged

ac·a·rus

[ak-er-uhs]
noun, plural ac·a·ri [ak-uh-rahy] .
a mite, especially of the genus Acarus.

Origin:
1650–60; < Neo-Latin < Greek ákari mite

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Acari is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Collins
World English Dictionary
acarus (ˈækərəs) [Click for IPA pronunciation guide]
 
n , pl -ri
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 & Unabridged 10th Edition
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American Heritage
Medical Dictionary

Acarus Ac·a·rus (āk'ə-rəs)
n.
A genus of mites.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences from the web
Acarina acarina or acari are a taxon of arachnids that contains mites and ticks.
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