Webster dictionary was developed by Noah Webster in the beginning of 19th century. On this website, you can find definition for Hydrachnid from the 1913 edition of Webster's Revised Unabridged Dictionary. Define Hydrachnid using one of the most comprehensive free online dictionaries on the web.

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Part of Speech: noun
Results: 1
1. An aquatic mite of the genus Hydrachna. The hydrachnids, while young, are parasitic on fresh- water mussels.
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