Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

exa-

In units of measurement, a factor of 1018.

[Based on the Greek prefix hexa-, six, by deleting the first letter.]

This is one of the standard SI (Système International) decimal prefixes (see the entry Words for multiples). This form is rarely met with in general scientific usage; an example is exajoule. It is occasionally used in discussions predicting very fast computers in the future, as in exaflop (see -flop), or large amounts of data: exabyte.

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