The Collaborative International Dictionary
Vincetoxin
Vincetoxin \Vin`ce*tox"in\, n. (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.
Wiktionary
vincetoxin
n. (context organic chemistry English) A glucoside extracted from the root of the white swallowwort.