Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Any of several North American plants, especially blue cohosh, black cohosh, and baneberry.

from The Century Dictionary.

  • noun A name in the United States of several plants which have been used medicinally.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Bot.) A perennial American herb (Caulophyllum thalictroides), whose rootstock is used in medicine; -- also called pappoose root. The name is sometimes also given to the Cimicifuga racemosa, and to two species of Actæa, plants of the Crowfoot family.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun A perennial American herb (Caulophyllum thalictroides), whose rough rootstock is used in medicine.
  • noun A smooth herb, Actaea racemosa, marketed for medicinal use.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a plant of the genus Actaea having acrid poisonous berries

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[From Eastern Abenaki kkwὰhas.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From an Algonquian word meaning "rough", probably Eastern Abenaki / Penobscot *kkwὰhas. Compare Massachusett kushki ("(it is) rough").

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