pleuston

pleus·ton

[ploo-stuhn, -ston]
noun Biology.
a buoyant mat of weeds, algae, and associated organisms that floats on or near the surface of a lake, river, or other body of fresh water.

Origin:
1940–45; pleus- (< Greek pleûs(is) sailing, or pleus- aorist stem of pleîn to sail, go by sea) + -ton, on the model of nekton, plankton

pleus·ton·ic [ploo-ston-ik] , adjective
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World English Dictionary
pleuston (ˈpluːstən, -stɒn) [Click for IPA pronunciation guide]
 
n
a mass of small organisms, esp algae, floating at the surface of shallow pools
 
[C20: from Greek pleusis sailing, from plein to sail; for form, compare plankton]

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Pleuston is always a great word to know.
So is flibbertigibbet. Does it mean:
a chattering or flighty, light-headed person.
a fool or simpleton; ninny.
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