Water flea

(definition) by Webster 1913 Wed Dec 22 1999 at 4:21:10

Wa"ter flea` (?). Zool.

Any one of numerous species of small aquatic Entomostraca belonging to the genera Cyclops, Daphnia, etc; -- so called because they swim with sudden leaps, or starts.

 

© Webster 1913.

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