Dictionaryno'ble rot'Winemaking. the fungus Botrytis cinerea, which is cultivated in some winemaking processes, esp. in the making of French Sauternes, where the ripened grapes become shriveled as a result of its introduction, thereby concentrating the juice and increasing the sugar content. Also called no'ble mold'. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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