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
organismsthat live floatingat the surface of water.
- noun botany Plants that live
floatingat the surface of water.
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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