Definitions for ouabainwɑˈbɑ ɪn
Random House Webster's College Dictionary
a white crystalline glycoside, C29H44O2, extracted from the seeds or wood of certain African trees and used as a poison on the tips of arrows or in medicine as a heart stimulant.
Origin of ouabain:
1890–95 < F ouaba(ïo) (< Somali waabayyo arrow poison) + -in1
g-strophanthin, a poisonous cardiac glycoside.
Origin: Through from Somali waabaayo, "arrow poison".
U.S. National Library of Medicine
A cardioactive glycoside consisting of rhamnose and ouabagenin, obtained from the seeds of Strophanthus gratus and other plants of the Apocynaceae; used like DIGITALIS. It is commonly used in cell biological studies as an inhibitor of the NA(+)-K(+)-EXCHANGING ATPASE.