Source : Webster's Revised Unabridged Dictionary (1913)

Racemic \Ra*ce"mic\, a. [Cf. F. rac['e]mique. See {Raceme}.]
   (Chem.)
   Pertaining to, or designating, an acid found in many kinds of
   grapes. It is also obtained from tartaric acid, with which it
   is isomeric, and from sugar, gum, etc., by oxidation. It is a
   sour white crystalline substance, consisting of a combination
   of dextrorotatory and levorotatory tartaric acids. --Gregory.