What is "cerealine"

Cerealine, also known as malt flakes, was a popular 19th century American cereal product and the first dry breakfast food. Similar to but predating corn flakes, which appeared in 1898 and are first rolled and then toasted, cerealine is corn grits in the form of uncooked flakes. It was originally used by the brewing industry.

More popularly, Toasted Cerealine Flakes, colloquially called simply Cerealine, was also the brand name for raw-flake cereal made from grits by the Cerealine Manufacturing Company of Indianapolis, Indiana, United States, and its successor concern, the American Hominy Company.