| Noun | 1.Zb - a unit of information equal to 1000 exabits or 10^21 bitsZbit, zettabitcomputer memory unit - a unit for measuring computer memoryEb, Ebit, exabit - a unit of information equal to 1000 petabits or 10^18 bitsYbit, yottabit, Yb - a unit of information equal to 1000 zettabits or 10^24 bits | | 2.ZB - a unit of information equal to 1000 exabytes or 10^21 byteszettabytecomputer memory unit - a unit for measuring computer memoryexabyte, EB - a unit of information equal to 1000 petabytes or 10^18 bytesyottabyte, YB - a unit of information equal to 1000 zettabytes or 10^24 bytes | | 3.ZB - a unit of information equal to 1024 exbibytes or 2^70 byteszebibyte, ZiB, zettabytecomputer memory unit - a unit for measuring computer memoryEiB, exbibyte, exabyte, EB - a unit of information equal to 1024 pebibytes or 2^60 bytesYiB, yobibyte, yottabyte, YB - a unit of information equal to 1024 zebibytes or 2^80 bytes |