Jeffersonite
Jef"fer*son*ite\, n. [Named after Thomas Jefferson.] (Min.) A variety of pyroxene of olive-green color passing into brown. It contains zinc.| a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison. |
| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
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