/ak"euh ruyn', -reen", -rin/ , n.
1. any of numerous arachnids of the order Acarina, comprising the mites and ticks.
adj.
2. belonging or pertaining to the order Acarina.
Also, acarian /euh kair"ee euhn/ .
[ 1820-30; Acarina name of the order, equiv. to Acar ( us ) name of the genus (see ACARUS) + -ina, neut. pl. of -inus -INE 1 ]