- a glycoside occurring as a white, crystalline powder, C29H44O12, obtained from the seeds of a shrub, Strophanthus gratus, or from the wood of trees of the genus Acokanthera, and used in medicine chiefly as a cardiac stimulant.
- a poisonous white crystalline glycoside extracted from certain trees and used as a heart stimulant and, by some African tribes, on poison darts. Formula: C 29 H 44 O 12 .8H 2 O
