Huntington's chorea Syllabification: (Hun·ting·ton's cho·re·a)Pronunciation: /ˈhəntiNGtənz kəˈrēə/Definition of Huntington's chorea noun a hereditary disease marked by degeneration of the brain cells and causing chorea and progressive dementia. Origin: late 19th century: named after George Huntington (1851–1916), the US neurologist who first described it