Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Macroscopic organisms that float or swim on the surface of a body of water.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun ecology The organisms that live floating at the surface of water.
  • noun botany Plants that live floating at the surface of water.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Greek pleusis, sailing; see pleu- in Indo-European roots + (plank)ton.]

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Examples

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