"Oatmeal" is a very confusing word to me because it's not actually "meal" (meaning "flour" in this case). There is actually a flour made out of oats, but it's not what you would make porridge out of.
Flour as you know it is not quite the same thing as meal milled at the time when the words were being invented. Wheatmeal is still a thing, look up images of it and the resemblance to oatmeal should be a lot more apparent!
Flour as you know it is not quite the same thing as meal milled at the time when the words were being invented. Wheatmeal is still a thing, look up images of it and the resemblance to oatmeal should be a lot more apparent!