[ploo-stuh n, -ston]
- 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 of pleuston
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- 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