Vincetoxin

Vin`ce`tox´in


n.1.(Chem.) A glucoside extracted from the root of the white swallowwort (Vincetoxicum officinale, a plant of the Asclepias family) as a bitter yellow amorphous substance; - called also asclepiadin, and cynanchin.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.