Xero can refer to: Xero , an online accounting system designed specifically for small and medium businesses Xero , an Australian punk rock band from the late 1970s and early 1980s Xero , an American rock band, who eventually became Linkin Park Xero , a science fiction fanzine that won a Hugo award in 1963 Xero , a superhero comic book published by DC Comics A character from The Atrocity Exhibition by J. G. Ballard A Greek word meaning