ALL meanings of pond scum
pond scum
P p - noun pond scum any free-floating freshwater alga that forms a green scum on water. 1
- noun pond scum algae living in pond water 1
- noun pond scum a greenish layer floating on the surface of stagnant waters, consisting of various freshwater algae 0
- noun pond scum a mass of filamentous algae forming a green scum on the surface of ponds, etc. 0