|Compare phytoplankton the animal constituent of plankton, which consists mainly of small crustaceans and fish larvae|
|an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.|
|a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.|
|zooplankton (zō'ə-plāngk'tən) Pronunciation Key
Plankton that consists of tiny animals, such as rotifers, copepods, and krill, and of microorganisms once classified as animals, such as dinoflagellates and other protozoans.