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white snakeroot

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noun
  1. a North American boneset, Eupatorium rugosum, that has heads of white flowers and causes trembles and milk sickness.
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Origin of white snakeroot

An Americanism dating back to 1810–20
Also called Indian sanicle.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018