1. (a unit of information equal to 1000 zettabytes or 10^24 bytes) yottabyte, YB synonim: jottabajt2. (a unit of information equal to 1024 zebibytes or 2^80 bytes) yottabyte, yobibyte, YB, YiB: : synonim: jottabajtsynonim: jobibajtsynonim: YiB