from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. An optically inactive form of tartaric acid, C4H6O6, that can be separated into dextrorotatory and levorotatory components and is sometimes found in grape juice during the making of wine.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. an equal mixture of the d- and l- forms of tartaric acid found in grape juice; the isomers can be separated via crystallization

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the optically inactive form of tartaric acid that is often found in grape juice


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