ouabain/ˈwɑːbeɪn/EtymologyFrom ouaba(io) + -in, after French ouabain, ultimately from Somali waabaayo, meaning "arrow poison".nounA poisonous cardiac glycoside, g-strophanthin, found in the seeds of certain lianas.“In moderate dosage ouabain is used today to treat emergency heart failure; in excessive doses it makes the heart go crazy, pumping wildly until it collapses.”