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Acari Line breaks: Acari
Pronunciation: /əˈkɑːri/
(also Acarina ˌakəˈrʌɪnə)

Definition of Acari in English:

plural noun

A large order (or subclass) of small arachnids which comprises the mites and ticks. They are distinguished by an apparent lack of body divisions.
Example sentences
  • Among the 11 extant orders of arachnids, Araneae and Acari (ticks and mites) are by far the most species rich.
  • The Chelicerates include among their number both the tiniest (the microscopic Acari or mites) and the hugest (the giant Paleozoic Eurypterida) of all the Arthropoda.
  • In addition to Diptera, CI has since been found to be a Wolbachia-induced trait in a wide diversity of arthropod orders, including Acarina, Coleoptera, Homoptera, Hymenoptera, Isoptera, Lepidoptera, and Orthoptera.


Pronunciation: /ˈakərɪd/
noun& adjective
Example sentences
  • Heavy infestations of acarid mites indicate that storage conditions are too damp or dusty.
  • When veterinarian Liu Guiqing of Shanghai Animal Husbandry and Veterinary Station treated a dog for acarid, she was surprised to discover the animal's owner, a divorced man who was very attached to the dog, was also ill.
  • Most dejecta of dust acarid may be found on home mattress, pillow, bedquilt, sofa, carpet and curtain.


Modern Latin (plural), from acarus, from Greek akari 'mite'.

Definition of Acari in:
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