from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various water fleas of the genus Daphnia, some species of which are commonly used as food for aquarium fish.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A water flea of the genus Daphnia.
from the GNU version of the Collaborative International Dictionary of English
- n. A genus of the genus Daphnia.
from The Century Dictionary and Cyclopedia
- n. A genus of minute fresh-water cladocerous entomostracous crustaceans, the type of the family Daphniidœ, and representative of the whole order Daphniacea or Cladocera.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. minute freshwater crustacean having a round body enclosed in a transparent shell; moves about like a flea by means of hairy branched antennae
In the lab, Diamond recently showed a visitor how he exposed tiny water fleas called daphnia to titanium dioxide nanoparticles.
Try offering less dried foods, especially pellets, or offer some daphnia which is believed to act as a laxative.
I was involved with an after school science program where one group tested the effects on daphnia of the components of sports drinks.
Daphnia are used as "biomoitors"--if the daphnia start acting beserk, something is wrong with the water.
There were all kinds of tiny animals in there, water beetles and daphnia and so on and so forth.
I hardly spend time contemplating the daphnia I carelessly tossed into the compost today, and the daphnia left certainly do not spend any time pondering me.
So I pull out yards and yards of elodea, and along with it snails and daphnia and copepods and stentorians and paramecia.
So now one has the red silverfish-like shrimp, daphnia and small clams, and another has the anostracans.
Such studies typically find strong trophic cascades in aquatic environments, where big fish eat minnows, which eat the tiny algae-eating crustaceans called daphnia.
But if takes the same daphnia down the hall and exposes it to a lamp that mimics sunlight, it will die within hours.