Definitions for daphniaˈdæf ni ə
Random House Webster's College Dictionary
daph•ni•aˈdæf ni ə(n.)(pl.)-ni•as.
any tiny freshwater branchiopod crustacean of the genus Daphnia, used as aquarium food.
Origin of daphnia:
1840–50; < NL, perh. after Daphne ; see -ia
daphnia, water flea(noun)
minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae
A water flea of the genus Daphnia.
Origin: From the genus name.
a genus of the genus Daphnia
U.S. National Library of Medicine
A diverse genus of minute freshwater CRUSTACEA, of the suborder CLADOCERA. They are a major food source for both young and adult freshwater fish.