'Water mite' definitions:

Definition of 'Water mite'

From: GCIDE

Water mite \Wa"ter mite`\ (Zool.) Any of numerous species of aquatic mites belonging to Hydrachna and allied genera of the family Hydrachnidae, usually having the legs fringed and adapted for swimming. They are often red or red and black in color, and while young are parasites of fresh-water insects and mussels. Called also water tick, and water spider. [1913 Webster] [1913 Webster]