Meaning of bufadienolide

bu•fa•di•en•o•lide

Pronunciation: (by"fu-dī-en'l-īd"), [key]
— n. Biochem.
  1. any of a family of steroid lactones, occurring in toad venom and squill, that possess cardiac-stimulating and antitumor activity.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.