Dictionnaires en ligne gratuits: Anglais, Espagnol, Français, Italien, Chinois, Allemand, Russe traductions, définitions, synonymes...
sludge  n 
1 soft mud, snow, etc. 
2 any deposit or sediment 
3 a surface layer of ice that has a slushy appearance 
4 (in sewage disposal) the solid constituents of sewage that precipitate during treatment and are removed for subsequent purification 
 (C17: probably related to slush) 
 sludgy  adj 
activated sludge    n 
a mass of aerated precipitated sewage added to untreated sewage to bring about purification by hastening bacterial decomposition