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Definition of Will Keith Kellog
1. Noun. United States food manufacturer who (with his brother) developed a breakfast cereal of crisp flakes of rolled and toasted wheat and corn; he established a company to manufacture the cereal (1860-1951). 
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1. Noun. United States food manufacturer who (with his brother) developed a breakfast cereal of crisp flakes of rolled and toasted wheat and corn; he established a company to manufacture the cereal (1860-1951).