penbutololEtymologyProbably from (cyclo)pen(tane) + (tertiary) but(yl) + -olol (“β-adrenoceptor antagonist”).penbutolol means A beta blocker used in the treatment of high blood pressure. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounA beta blocker used in the treatment of high blood pressure.