daphnia
daph·nia [ ˈdaf-nē-ə]
[ˈdaf-nē-ə]
: any of a genus (Daphnia) of minute freshwater branchiopod crustaceans with biramous antennae used as locomotor organs — compare water flea First Known Use of daphnia
1847, in the meaning defined above
History and Etymology for daphnia
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