| petabit | (noun) a unit of information equal to 1000 terabits or 10^15 bits | Synonyms: Pb, Pbit |
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| petabyte | (noun) a unit of information equal to 1024 tebibytes or 2^50 bytes | Synonyms: PB, pebibyte, PiB |
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| (noun) a unit of information equal to 1000 terabytes or 10^15 bytes | Synonyms: PB |
| petaflop | (noun) (computer science) a unit for measuring the speed of a computer system, equal to one quadrillion floating-point operations a second. | Synonyms: PFLOPS |
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| petal | (noun) part of the perianth that is usually brightly colored | Synonyms: flower petal |
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| petard | (noun) an explosive device used to break down a gate or wall | - |
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