Definition of peta- in English:

peta-

Syllabification: peta-

combining form

  • (Used in units of measurement) denoting a factor of 1015: petabytes

Origin

from pe(n)ta- (see penta-), based on the supposed analogy of tera- and tetra-.

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Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space