Superacid definitions

Superacid

According to the classical definition, a superacid is an acid with an acidity greater than that of 100% pure sulfuric acid, which has a Hammett acidity function (H0) of −12. According to the modern definition, superacid is a medium in which the chemical potential of the proton is higher than in pure sulfuric acid. Commercially available superaci...
Found on http://en.wikipedia.org/wiki/Superacid

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superacid

A medium having a high acidity, generally greater than that of 100 wt.-% sulfuric acid. The common superacids are made by dissolving a powerful Lewis acid (e.g. SbF₅) in a suitable Brønsted acid, such as HF or HSO₃F. (An equimolar mixture of HSO₃F and SbF₅ is known by the trade name 'magic acid'.) In a b...
Found on http://www.chem.qmul.ac.uk/iupac/gtpoc/StSy.html

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superacid

superacid, superacidity Excessively acid.
Found on http://www.wordinfo.info/words/index/info/view_unit/2069/3

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