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peta-

   Also found in: Medical, Acronyms, Encyclopedia, Wikipedia 0.01 sec.
peta-
pref.
1. One quadrillion (1015): petahertz.
2. 1,125,899,906,842,624 (250): petabyte.
[Alteration of penta- (from its representing the fifth power of a thousand).]
peta-
prefix
(Mathematics & Measurements / Units) denoting 1015 petametres Symbol P
[so named because it is the SI prefix after tera-; on the model of penta-, the prefix after tetra-]
peta-
1. A prefix that means:
2. One quadrillion (1015), as in petahertz, one quadrillion hertz.
3. 250 (that is, 1,125,899,906,842,624), which is the power of two closest to a quadrillion, as in petabyte.
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