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Derris

[der-is]

noun

any East Indian plant belonging to the genus Derris, of the legume family, especially D. elliptica, the roots of which contain rotenone and are used as an insecticide.

Origin:
1855–60; Neo-Latin < Greek: a covering, derivative of déros skin, hide; see derma¹

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Derris is always a great word to know.

So is bezoar. Does it mean:

a fool or simpleton; ninny.

a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.

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Collins

World English Dictionary

derris (ˈdɛrɪs)

—n
	any East Indian leguminous woody climbing plant of the genus Derris, esp D. elliptica, whose roots yield the compound rotenone

[C19: New Latin, from Greek: covering, leather, from deros skin, hide, from derein to skin]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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rotenone

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Derris

der·ris