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Definition of ITCH MITE
: any of several minute parasitic mites that burrow into the skin of humans and animals and cause itch; especially: a mite of any of several varieties of a species of the genus Sarcoptes (S. scabiei) that causes the itch, is about 1⁄60 inch (0.4 millimeter) long, and has a round-ovate body and 3-jointed legs and mandibles resembling minute needles
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