资料来源 : Webster's Revised Unabridged Dictionary (1913)

Water mite \Wa"ter mite`\ (Zo["o]l.)
   Any of numerous species of aquatic mites belonging to
   {Hydrachna} and allied genera of the family {Hydrachnid[ae]},
   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}.