Breathalyzer (noun)

A device used to measure the alcohol content in a person's breath.

Origin:

From breath + analyzer.

Examples:

1. The police officer asked the driver to blow into the breathalyzer.
2. The breathalyzer showed that the driver's blood alcohol content was above the legal limit.
3. The breathalyzer is a device that can accurately measure the amount of alcohol in a person's breath.
4. The driver was arrested after the breathalyzer test showed that he was drunk.
5. The breathalyzer is an important tool in identifying and preventing drunk driving.