bufadienolide

[byoo-fuh-dahy-en-l-ahyd]

bu·fa·di·en·o·lide

[byoo-fuh-dahy-en-l-ahyd]
noun Biochemistry.
any of a family of steroid lactones, occurring in toad venom and squill, that possess cardiac-stimulating and antitumor activity.

Origin:
1965–70; from bufa-20, 22-dienolide a chemical component of such lactones; compare Latin būfō toad
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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Bufadienolide is always a great word to know.
So is zirconium. Does it mean:
Symbol: Os; atomic weight: 190.2; atomic number: 76
Symbol: Zr; atomic weight: 91.22; atomic number: 40
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