Source : WordNet®

blue cohosh
     n : tall herb of eastern North America and Asia having blue
         berrylike fruit and a thick knotty rootstock formerly
         used medicinally [syn: {blueberry root}, {papooseroot}, {papoose
         root}, {squawroot}, {squaw root}, {Caulophyllum
         thalictrioides}, {Caulophyllum thalictroides}]