单词	beta-blocker
释义	beta-blocker noun be·​ta-block·​er ˈbā-tə-ˌblä-kər  : any of a class of drugs (such as propranolol) that decrease the rate and force of heart contractions and lower high blood pressure by blocking the activity of beta-receptors beta-blocking ˈbā-tə-ˌblä-kiŋ  adjective Word History First Known Use 1965, in the meaning defined above Medical Definition beta-blocker noun be·​ta-block·​er -ˈbläk-ər  : any of a group of drugs (as propranolol) that combine with and block the activity of a beta-receptor to decrease the heart rate and force of contractions and lower high blood pressure and that are used especially to treat hypertension, angina pectoris, and ventricular and supraventricular arrhythmias compare alpha-blocker
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