Noun daphnia has 1 sense
  1. daphnia, water flea - minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae
    --1 is a kind of branchiopod crustacean, branchiopod, branchiopodan
    --1 is a member of genus Daphnia
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