1. (

• lead ,
• Pb ,
• atomic_number_ ,

) 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" ;

2. (

• petabit ,
• Pbit ,
• Pb ,

) a unit of information equal to 1000 terabits or 10^15 bits ;

3. (

• petabyte ,
• PB ,

) a unit of information equal to 1000 terabytes or 10^15 bytes ;

4. (

• petabyte ,
• pebibyte ,
• PB ,
• PiB

) a unit of information equal to 1024 tebibytes or 2^50 bytes ;