At one time, algae were thought to be plants, but are not because they lack roots, stems and leaves.
Dross is defined as worthless waste matter.
Something broken off or removed to be discarded, especially plant trimmings.
Dregs are defined as the most worthless and most undesirable of all items, or the remnants that settle to the bottom of liquid in a container.
A colloidal dispersion of a gas in a liquid or solid medium, such as shaving cream, foam rubber, or a substance used to fight fires. A foam may be produced, especially on the surface of a liquid, by agitation or by a chemical reaction, such as fermentation.
Matter remaining after completion of an abstractive chemical or physical process, such as evaporation, combustion, distillation, or filtration; residuum.
A slurry containing very fine particulate matter.
The definition of cleanliness means the state of being free from dirt or unwanted matter.
The basest or least desirable portion:
A tumultuous crowd; a mob.
The lowest social class; the rabble.
Foaming saliva caused by disease or great excitement
Find another word for scum. In this page you can discover 33 synonyms, antonyms, idiomatic expressions, and related words for scum, like: scumbag, lowlife, algae, dross, trash, dregs, foam, recrement, refuse, residue and slime.