creamoftartar

Definitions of cream of tartar in various dictionaries:

noun - a salt used especially in baking powder

CREAM OF TARTAR - A reddish crust or sediment in wine casks, consisting essentially of crude cream of tartar, and used in marking pure cream of tartar, tartaric acid, potassium carbonate, black flux, etc., and, in dyeing, as a mordant for woolen goods; -- called also argol, wine stone, etc.