Plankton

[plangk-tuh n] /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.
/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
n.

1891, from German Plankton (1887), coined by German physiologist Viktor Hensen (1835-1924) from Greek plankton, neuter of planktos “wandering, drifting,” verbal adjective from plazesthai “to wander, drift,” from plazein “to drive astray,” from PIE root *plak- (2) “to strike, hit” (see plague (n.)). Related: Planktonic.
plankton
(plāngk’tən)
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. Compare benthos, nekton.

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