Meaning of Daphnia*

Daph•ni•a

Pronunciation: (daf'nē-u), [key]
— n.
  1. a genus of tiny, freshwater crustaceans having a transparent body, used in biological research and as food for tropical fish. Cf. water flea.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.