I am here to answer your question(lmao):
Oatmeal refers to a preparation of oats that have been dehusked, steamed and flattened, or else a coarse flour made of hulled oat grains that have either been milled or steel-cut. Ground oats are also called "white oats". Steel-cut oats are known as "coarse oatmeal", "Irish oatmeal" or "pinhead oats".
Source(s): Wikipedia