Bac

/bæk/ noun

Definition

Short for 'blood alcohol content,' the amount of alcohol measured in a person's bloodstream, usually expressed as a percentage.

Etymology

An acronym created from 'blood,' 'alcohol,' and 'content' in the 20th century as a legal and medical measurement for intoxication.

Kelly Says

BAC is scientifically fascinating because alcohol affects the brain in predictable ways at different levels—at 0.08% you're legally drunk in most places, but even tiny amounts show up in blood tests!

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