daphnia

Definitions

  • WordNet 3.6
    • n daphnia minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae
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Webster's Revised Unabridged Dictionary
    • n Daphnia (Zoöl) A genus of the genus Daphnia.
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Century Dictionary and Cyclopedia
    • n daphnia A genus of minute fresh-water cladocerous entomostracous crustaceans, the type of the family Daphniidœ, and representative of the whole order Daphniacea or Cladocera. The species are among the many small crustaceans known as water-fleas. The best-known species is D. pulex, the “branch-horned” water-flea, which is a favorite microscopic object. The head is prolonged into a snout, and is provided with a single central compound eye; it is also furnished with antennæ which act as oars, propelling it through the water by a series of short springs or jerks. These animals are very abundant in many ponds and ditches; and as they assume a red color in summer, the swarms which abound in stagnant water impart to it the appearance of blood.
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Etymology

Webster's Revised Unabridged Dictionary
NL

Usage

In literature:

Cannon and Davenport, experiments on Daphniae by.
"Darwin and Modern Science" by A.C. Seward and Others
Daphnia, economy of, 325.
"Omphalos" by Philip Henry Gosse
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In news:

Heard about the benefits of feeding your fish daphnia but having a tough time finding it on store shelves.
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