1. (organic chemistry) a colourless crystalline dicarboxylic acid, hydroxy-malonic acid, found in wine, apples and other fruit; it is converted to lactic acid by malo-lactic fermentation

Encyclopedia: Malic acid

• Oort cloud
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• ootid
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• ooze out
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• oozing
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• op
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• opacification
• opacify
• opacity
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• opaline