What does acarid mean?
An acarid is any member of a large group of tiny arachnids known scientifically as the Acari, a group that includes mites and ticks. Although acarids are relatives of spiders and scorpions, most are so small that they are invisible to the naked eye, and they occupy an astonishing range of habitats: soil, leaf litter, stored food, freshwater, and even the follicles of human skin. Some acarids, such as house dust mites, are familiar household nuisances and common triggers of allergies and asthma, while others, like ticks, are significant vectors of disease in animals and humans. Because of their medical, agricultural, and ecological importance, acarids are studied intensively by zoologists and pest-control specialists. In general usage the word appears mostly in scientific and technical writing, where it serves as a precise collective term for this diverse and remarkably successful lineage of miniature arachnids.
nounAn acarid is a mite — any of numerous tiny arachnids of the order (or subclass) Acari, which includes dust mites, ticks, and many other minute eight-legged creatures. The term is used chiefly in zoology and agriculture.
- Any minute arachnid of the order Acari; a mite or tick.
"The stored grain was found to be heavily infested with acarids."
"Poultry farmers monitor flocks closely for acarids, which can spread disease and reduce egg production."
"Under the microscope, the acarid's eight legs and unsegmented body clearly marked it as a relative of spiders rather than insects."
The standard plural adds -s; the collective group name "Acari" is also used in scientific writing.
"Acarids thrive in warm, humid bedding, feeding on flakes of shed human skin."
Dust mites in your mattress are acarids — meaning you are almost certainly sharing your bed with hundreds of them right now.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of acarid
The word "acarid" derives from the Greek "akari" (ἀκάρι), meaning a mite, combined with the suffix "-id" used to form names of zoological groups. It entered English through modern scientific Latin classification, alongside the related adjective "acarine" and the group name "Acari." Its roots are therefore firmly Greek, reflecting the long history of mites in natural-history writing.
Related word forms
How acarid is actually used
Acarid is a technical term used mainly in zoology, entomology, veterinary medicine, and agriculture; in everyday speech people simply say "mite" or "tick." The adjective form is "acarine."
Easily confused with acarid
"Acrid" is an adjective describing a sharp, bitter smell or taste, while "acarid" is a noun referring to a mite or tick.