Found 2 items, similar to water flea.
English → English (WordNet) Definition: water flea water flea n 1: minute free-swimming freshwater copepod having a large median eye and pear-shaped body and long antennae used in swimming; important in some food chains and as intermediate hosts of parasitic worms that affect man e.g. Guinea worms [syn: cyclops] 2: minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae [syn: daphnia]
English → English (gcide) Definition: Water flea Water flea \Wa"ter flea`\ (Zo["o]l.) 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. [1913 Webster]