1. Plural of fusel; undesirable volatile alcohols (such as amyl alcohol) produced as byproducts during fermentation, especially in the production of spirits and beer.
Usage: technical; chemistry/brewing context; often used in plural form

Examples

• The distiller carefully monitored the fusels produced during fermentation to ensure product quality.
• Fusels contribute to the harsh taste and unpleasant odor in poorly made spirits.
• Modern brewing techniques help minimize the formation of fusels in beer production.
• The presence of fusels can cause headaches and hangovers in consumers.
• Chemists analyze fusels to understand the fermentation process better.