noun
blood alcohol concentration; BAC
Technical and legal term for the amount of alcohol in the bloodstream, often used in contexts of drunk driving or medical testing.
警察は運転手の血中アルコール濃度を測定した。
The police measured the driver's blood alcohol concentration.
Compound of 血中 (けっちゅう, 'in the blood'), アルコール (alcohol), and 濃度 (のうど, 'concentration').