pb

Noun pb has 4 senses

• pb(n = noun.substance) atomic number 82, lead - a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey; "the children were playing with lead soldiers"
is a kind of metal, metallic element
has particulars: hard lead, antimonial lead, hard lead, pig lead

• pb(n = noun.quantity) pbit, petabit - a unit of information equal to 1000 terabits or 10^15 bits;
is a kind of computer memory unit
has parts: tb, tbit, terabit
is a part of eb, ebit, exabit

• pb(n = noun.quantity) petabyte - a unit of information equal to 1000 terabytes or 10^15 bytes;
is a kind of computer memory unit
has parts: tb, terabyte
is a part of eb, exabyte

• pb(n = noun.quantity) pebibyte, petabyte, pib - a unit of information equal to 1024 tebibytes or 2^50 bytes;
is a kind of computer memory unit
has parts: tb, tebibyte, terabyte, tib
is a part of eb, eib, exabyte, exbibyte