Dictionary
cream' of tar'tar
a white, crystalline, water-soluble powder, C
4H
5KO
6, used chiefly as an ingredient in baking powders and in galvanic tinning of metals. Also called
potassium bitartrate, potassium acid tartrate. Cf.
tartar (def. 3).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.