noun🔗ShareA layer of impurities that accumulates at the surface of a liquid (especially molten metal or water)."During smelting, scum rises to the surface and is then removed by the smelter."materialsubstancechemistryChat with AIVocabulary GamePractice Reading
noun🔗ShareA greenish water vegetation (such as algae), usually found floating on the surface of ponds"These organisms form scum in large quantities."environmentplantnaturebiologyorganismecologyChat with AIVocabulary GamePractice Reading
noun🔗ShareThe topmost liquid layer of a cesspool or septic tank."The plumber warned us about the thick scums floating on top of the septic tank, explaining that they needed to be professionally removed. "substanceenvironmentChat with AIVocabulary GamePractice Reading
noun🔗ShareA reprehensible person or persons."People who sell used-up pens are scum, just total low-lives."personcharactermoralnegativeattitudesocietyChat with AIVocabulary GamePractice Reading
