edible plant root of eastern U.S., 1610s, American English, from Powhatan (Algonquian) tockawhouge (compare Mohegan tquogh, Shawnee tukwhah), perhaps related to Cree (Algonquian) pitikwaw "made round." From early 19c. a name applied in Virginia to those east of the Blue Ridge Mountains by the settlers west of them, who called themselves Cohees.
