From Longman Dictionary of Contemporary Englishbeta-blockerˈbeta-ˌblock‧er noun [countable] MDa drug used to help prevent heart attacks
Examples from the Corpus
beta-blocker• Readily available alternatives, particularly diuretics and beta-blockers, should be used instead, he says.• Certain drugs - such as aspirin, beta-blockers, and cholesterol lowering drugs - benefit some people but not others.• No, what I really needed was a handful of beta-blockers.• Many other beta-blockers were subsequently developed by different companies, because the market was very large.• Other beta-blockers also have been used successfully. 