|
English to English noun
| 1 |
worthless or dangerous material that should be removed |  | Example: there were impurities in the water
source: wordnet30
| 2 |
the scum formed by oxidation at the surface of molten metals | | source: wordnet30
| 3 |
The scum or refuse matter which is thrown off, or falls from, metals in smelting the ore, or in the process of melting; recrement. | | source: webster1913
|