BREATHALYZER

breathalyzer, breathalyser

(noun) a device that measures chemicals (especially the alcohol content) in a person’s expired breath

Source: WordNet® 3.1

Etymology

Noun

breathalyzer (plural breathalyzers)

A device that measures alcohol in expired air so as to estimate the concentration of alcohol in a person's blood; used by traffic police in cases of suspected driving while under the influence of alcohol.

Usage notes

Often capitalized.

Source: Wiktionary

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