a transparent, colorless, crystalline compound occurring in nature with d-tartaric acid: it is an optically inactive isomer of tartaric acid
Origin:
< raceme: orig. found in grapes
See racemic acid in American Heritage Dictionary 4
noun
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.