malic acid

mal·ic acid   (māl'ĭk, mā'lĭk)    n.  A colorless, crystalline compound, COOH·CH2·CHOH·COOH, that occurs naturally in a wide variety of unripe fruit, including apples, cherries, and tomatoes, and is used as a flavoring and in the aging of wine. [French (acide) malique, from Latin mālum, apple, from Greek mēlon, mālon.]

Main Entry: malic acid
Function: noun
: any of three optical isomers of a crystalline dicarboxylic acid C₄H₆O₅; especially : the one found in various plant juices and formed as an intermediate in the Krebs cycle

malic acid mal·ic acid (māl'ĭk, mā'lĭk)
n.
A colorless crystalline intermediate in the Krebs cycle that occurs naturally in a variety of unripe fruit and is used as a flavoring and in the aging of wine.