The act of stopping bleeding; hemostasis. Used in medical and first-aid contexts (often used as 'to stop bleeding').
傷が深かったが、看護師がすぐに止血してくれた。
The wound was deep, but the nurse stopped the bleeding immediately.
病院で止血の処置を受けた。
I received hemostatic treatment at the hospital.
止血帯を使って止血するのは、緊急時の応急処置だ。
Using a tourniquet to stop bleeding is an emergency first-aid measure.