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blue cohosh

noun
  1. See under cohosh.
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Origin of blue cohosh

An Americanism dating back to 1815–25

cohosh

[koh-hosh, koh-hosh]
noun
  1. either of two unrelated plants of the eastern U.S., Cimicifuga racemosa (black cohosh), of the buttercup family, or Caulophyllum thalictroides (blue cohosh), of the barberry family, both used medicinally.
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Origin of cohosh

1790–1800, Americanism; < Eastern Abenaki kkwὰhas
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for blue cohosh

cohosh

noun
  1. any of several North American plants, such as the blue cohosh (Caulophyllum thalictroides: family Leonticaceae) and black cohosh (Cimicifuga racemosa: family Ranunculaceae)
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Word Origin

C18: probably of Algonquian origin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012