ˈhīfəˌnizəm noun
( -s )
Etymology: hyphen (I) + -ism; from the use of hyphenated words (as German-American, Irish-American) to designate foreign-born citizens of the United States
: the quality or state of being a hyphenate : the conduct that marks or is ascribed to hyphenates
hyphenism in the United States is almost extinct — E.A.Mowrer