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plankton

American  
[plangk-tuhn] / ˈplæŋk tən /

noun

  1. the aggregate of passively floating, drifting, or somewhat motile organisms occurring in a body of water, primarily comprising microscopic algae and protozoa.


plankton British  
/ plæŋkˈtɒnɪk, ˈplæŋktən /

noun

  1. the organisms inhabiting the surface layer of a sea or lake, consisting of small drifting plants and animals, such as diatoms Compare nekton

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

plankton Scientific  
/ plăngktən /
  1. Small organisms that float or drift in great numbers in bodies of salt or fresh water. Plankton is a primary food source for many animals, and consists of bacteria, protozoans, certain algae, cnidarians, tiny crustaceans such as copepods, and many other organisms.

  2. Compare benthos nekton


Other Word Forms

  • planktonic adjective

Etymology

Origin of plankton

1890–95; < German, special use of neuter of Greek planktós drifting, equivalent to plang-, variant stem of plázesthai to drift, roam, wander + -tos verbid suffix

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Sometimes for a whole day they talked in sea lion grunts or frigate bird squawks or plankton wiggles.

From Literature

When climate models leave out calcifying plankton, they may miss key steps in the global carbon cycle.

From Science Daily

When they open them, a seascape galaxy of stars appears -- the bluish-white flashes of creatures from plankton and jellyfish to shrimp and fish responding to the sub lights.

From Barron's

The approach is also highly efficient, since it removes almost all plankton from the water.

From Science Daily

These nutrients stimulate the growth of plankton, microscopic organisms that absorb carbon dioxide through photosynthesis.

From Science Daily