Sentence:  Stanley Lieberson (1985) has used the term " <WSD>unhyphenated</WSD> white" to identify a growing group of Americans who lack any clear-cut identification with or knowledge of specific European origins. 
Meaning of the word marked with <WSD> tags:  Of people, belonging to a single ethnicity or nationality: names for multi-ethnic/multi-nationality groups generally require a hyphen to connect the names being combined.