1. a substance or agent added to a liquid to reduce or eliminate foam
Usage: technical; commonly used in industrial and manufacturing contexts

Examples

• The factory added a defoamer to the cooling system to prevent excessive foam buildup.
• Defoamers are essential in wastewater treatment plants to control foam during processing.
• The chemical engineer recommended a silicone-based defoamer for the production line.
• Without a defoamer, the detergent solution would overflow with bubbles.
• The defoamer reduced foam in the fermentation tank by 80 percent.