scum


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scum

1. the greenish film of algae and similar vegetation surface of a stagnant pond
2. the skin of oxides or impurities on the surface of a molten metal

scum

[skəm]
(materials)
A film of impurities that rises to or is formed on the surface of a liquid.
A slimy film formed on the surface of a solid object.

scum, scumming

1. A surface deposit sometimes formed on clay bricks; caused either by soluble salts in the clay which migrate to the surface as moisture escapes during drying (drier scum) or by the formation of deposits during kiln firing (kiln scum).
2. A mass of organic matter which floats on the surface of sewage.
References in periodicals archive ?
Lets hope this scum bag who attacked the grandad is caught soon, and gets a good sentence.
The initial solids contents of each tank (sludge depth and scum thickness) were classified into one of three relative maintenance levels prior to the study (low, intermediate, and high).
Clean Disinfecting Bath Cleaner with Febreze freshness offers an excellent clean with a foaming action that dissolves soap scum.
When questioned about her motives for this attack, Solanas referred to a text which she had written shortly before the incident: the SCUM Manifesto (3).
During the Senate debate over ratifying the League of Nations Covenant, Senator William Borah (R-Idaho) warned that a world "peacekeeping army" would consist of "the gathered scum of the nations organized into a conglomerate international police force.
Paris has never appeared more unattractive than in Peter Gadol's latest novel, Light at Dusk, All sorts of strikes and demonstrations are Doing on, racist graffiti cover the beautiful buildings, the residents are fleeing, and everyone is tossing their stale bread into the Seine, so the river is covered with a scum of waterlogged baguettes, brioches, croissants, and pain au chocolat.
Could the green scum that grows on the walls of a fish tank produce the fuel of the future?
As the culture begins to change, you will notice a thin scum of a white substance will form on the very top of the clear layer.
New product introductions by Bissell and Royal Dirt Devil gave the figurative stamp of approval to the category that started when Black & Decker shipped its Scum Buster in 1996.
A father yesterday branded the killers of his nine-year-old daughter as scum.
Improved Kaboom(R) Shower, Tub & Tile Cleaner is now even tougher on soap scum, removing the difficult grime better, faster and easier than ever before.
Those who've forgotten should take a trip to Birchwood Park, Warrington, to watch the inquests into the deaths of 96 people who were left in cages to die because they were viewed collectively as troublemaking scum.