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