# acari

CEFR C2 · Noun

Source: https://englishreference.com/word/acari
Updated: 2026-05-26

## Definition

a large group of tiny animals, like mites and ticks, that are very common in nature. They are usually very small and often live on or near other animals.

For teachers: a subclass of arachnids consisting of mites and ticks, characterized by their small size and diverse habitats. Often used in scientific contexts to refer to the group as a whole.

## Examples

- The acari are found in almost every environment on Earth.
- Researchers studied the acari population in the soil to understand how the ecosystem was recovering after the flood.
- While many acari are microscopic and harmless, others, such as the scabies mite, are significant pests that cause widespread dermatological issues in humans and livestock.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.