chaptalize

to add extra sugar to wine to raise alcohol content
Found on http://phrontistery.info/c.html

Chaptalize

To add sugar to a must or juice to increase its alcohol potential, or to a new wine to balance the taste of its alcohol or the bite of its acidity or tannin. The word is a methode named after M. Chaptal, who in 1801 accurately calculated the amount of sugar to add to a wine to achieve balance.
Found on http://winemaking.jackkeller.net/glossary.asp
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