The Collaborative International Dictionary
Colocynthin
Colocynthin \Col`o*cyn"thin\, n. [Cf. F. colocynthine.] (Chem.) The active medicinal principle of colocynth; a bitter, yellow, crystalline substance, regarded as a glucoside.
Wiktionary
colocynthin
n. (context organic compound English) The active medicinal principle of colocynth; a bitter yellow crystalline substance, regarded as a glucoside.