cream of tartar definition

  • noun:
    • See potassium bitartrate.
    • potassium hydrogen tartrate (also called potassium bitartrate), a byproduct of wine manufacture, utilized in cooking powder plus in preparing to support outdone egg whites.
    • purified tartar or argol; so-called because of the crust of crystals which types on the surface of liquor in the process of purification by recrystallization. It is a white crystalline compound, with a gritty acid taste, and it is used really largely as an ingredient of cooking powders; -- called also potassium bitartrate, acidic potassium tartrate, etc.
    • See under Cream.
    • a salt utilized especially in baking dust

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