from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The collection of minute or microscopic organisms that inhabit the surface layer of a body of water.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. All the organisms that live at the surface of water
Greek neuston, neuter of neustos, swimming, from nein, to swim.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Ancient Greek νευστός ("swimming"). (Wiktionary)