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moonseed

[moon-seed] /ˈmunˌsid/
noun
1.
any climbing plant of the genus Menispermum, having greenish-white flowers and crescent-shaped seeds.
Origin
1730-1740
1730-40; moon + seed
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for moon seed

moonseed

/ˈmuːnˌsiːd/
noun
1.
any menispermaceous climbing plant of the genus Menispermum and related genera, having red or black fruits with crescent-shaped or ring-shaped seeds
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for moon seed

moonseed

any of three species of woody vines constituting the genus Menispermum of the family Menispermaceae (order Ranunculales). They occur in East Asia, eastern North America, and Mexico. The North American species, Canada moonseed, or yellow parilla (M. canadense), with lobed leaves and greenish-white flowers, bears black, grapelike fruit with crescent-shaped seeds. M. dauricum, from East Asia, and M. mexicanum, from Mexico, have similar properties. In particular, the seeds of all these species may cause a curare-like poisoning; one of the ingredients in curare comes from another member of Menispermaceae (Chondrodendron tomentosum).

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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