daphnia

noun
daph·​nia | \ ˈdaf-nē-ə How to pronounce daphnia (audio) \

Definition of daphnia

: 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

New Latin, genus name

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