Beta blocker
WordNet
noun
(1) Any of various drugs used in treating hypertension or arrhythmia; decreases force and rate of heart contractions by blocking beta-adrenergic receptors of the autonomic nervous system
WiktionaryText
Etymology
From action of drug which blocks beta-adrenergic receptors.
Noun
- A blocking agent, one of a class of drugs used to treat hypertension and control the rate at which the heart beats.