Wiktionary
alpha-blocker
n. (context pharmacology English) A drug which blocks α1-adrenergic receptors in artery and smooth muscles. Used to treat benign prostatic hyperplasia and prostatitis and other conditions.
WordNet
alpha-blocker
n. any of various drugs that block alpha-adrenergic receptors; used in treating benign prostatic hyperplasia; relaxes the muscles of the prostate and bladder [syn: alpha blocker, alpha-adrenergic blocker, alpha-adrenergic blocking agent]