J2O Full Form. Full Meaning of J2O Find long form and abbreviation, slang or definition of J2O. What does J2O mean? What does J2O 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.