RACEMIC a.
ining 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.…
RAISED a.
en, or yeast; -- used of bread, cake, etc., as distinguished from that made with cream of tartar, soda, etc. See Raise, v. t., 4. Raised beach. See under Beach, n.
ROCHELLE n.
France. Rochelle powders. Same as Seidlitz powders. -- Rochelle salt (Chem.), the double tartrate of sodium and potassium, a white crystalline substance. It has a cooling, saline, slightly bitter taste and is employed as a mild purgative. It was discovered by Seignette, an apothecary of Rochelle, and is called also Se…