1. a device or mechanism used to disconnect or separate coupled parts, especially in machinery or transportation
Usage: technical
2. a chemical compound that disrupts the normal coupling of processes in biological systems
Usage: biochemistry

Examples

• The train’s uncoupler allowed the engineer to separate the cars quickly.
• Railroad workers used the automatic uncoupler to disconnect the freight cars.
• The biochemist studied how the uncoupler affected cellular energy production.
• A faulty uncoupler caused delays in the switching yard.
• The mitochondrial uncoupler disrupted ATP synthesis in the experiment.
• Maintenance crews inspected each uncoupler before the train departed.