petabyte petabit • petal · · · Info · Definitions · Synonyms · Characters · · petabyte · · Text Latin · · Script 8 · · Length 3 · · Syllables Definitions · · · (noun) a unit of information equal to 1000 terabytes or 10^15 bytes. Synonyms: PB. · · Noun Definition 1 (noun) a unit of information equal to 1024 tebibytes or 2^50 bytes. Synonyms: pebibyte, PB, PiB. · · Noun Definition 2 Synonyms · · · pb · · Synonym 1 pebibyte · · Synonym 2 pib · · Synonym 3 Characters · · a latin small letter a U+0061 b latin small letter b U+0062 e latin small letter e U+0065 p latin small letter p U+0070 t latin small letter t U+0074 y latin small letter y U+0079