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ketchup, seasoned pureed condiment widely used in the United States and Great Britain. The origin of the word ketchup is not entirely clear; the word likely derives from the Chinese ke-tsiap, a fish brine, probably by way of the Malaysian ketjap. The Heinz company first began selling its famed ketchup as "catsup" in 1876. American ketchup is a sweet puree of tomatoes, onions, and green peppers flavoured with vinegar and pickling spice that is eaten...