Akademik

free-floating freshwater green algae

1. : any free-floating filamentous alga of the family Zygnemataceae; especially : spirogyra

2. : the mass of tangled filaments formed by any pond scum on stagnant or quiet waters

any free-floating freshwater alga that forms a green scum on water.

[1885-90]

pond scum noun

Green algae forming a layer on stagnant water

Main Entry: ↑pond

pond scum,

1. any free-floating, freshwater alga that forms a green scum on stagnant water, such as a spirogyra or related alga.

2. the green film formed by these algae.

n. a mass of algae forming a green film on the surface of stagnant water