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Meaning of proof spirit

proof' spir"it

Pronunciation: [key]
  1. an alcoholic liquor, or mixture of alcohol and water, containing a standard amount of alcohol. In the U.S. proof spirit has a specific gravity of .93353 (containing one half of its volume of alcohol of a specific gravity of .7939 at 60° F). In Britain proof spirit has a specific gravity of .91984.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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