[koh-hosh, koh-hosh] 
| 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. |
| co·hosh (kō'hŏsh') n. Any of several North American plants, especially blue cohosh, black cohosh, and baneberry. [From Eastern Abenaki kkwὰhas.] |