ˈakərəs noun
Etymology: New Latin, from Greek akari, a mite; probably akin to Greek keirein to cut off, shear — more at shear
1. capitalized : a genus of arachnids including a number of small mites and formerly including all mites and ticks
2. plural aca·ri -ˌrī, -ˌrē : a mite of the genus Acarus ; sometimes : mite