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Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A wine-making process in which the marc from which the juice has been separated as usual by pressure is mixed with a solution of sugar and water, and the mixture again fermented, the second steeping containing, like the first, notable quantities of potassium bitartrate, tannic acid, etc. Full definition →
Etymology from Wiktionary, CC BY-SA 4.0.