CSI-U Full Form. Full Meaning of CSI-U Find long form and abbreviation, slang or definition of CSI-U. What does CSI-U mean? What does CSI-U stand for? We are providing world largest and most comprehensive acronyms, names, abbreviations database directory on the Internet. Our data base contains more than 8,00,000 terms abbreviations and acronyms. You can also search unique terms more than 4,00,000 general Comprehensive words.