Any of various small or minute arachnids of the order Acarina that are often parasitic on animals and plants,infest stored food products,and in some species transmit disease.

• 螨类，蜱螨目的任何一种小的乃至微小的蜘蛛纲动物，通常寄生于动植物体内，也寄生在储藏食物中，有些种还传播疾病。