Cereal is the latin word for grain.
Wheat, corn, rice, barley, rye, oats, and buckwheat.
Oats and wheat
People have been eating boiled whole grains since prehistoric times, so we'll never know who the first one was.
Pancakes is a product, they contain several ingredients. They can cointain either.
How to Make Creamy Whole Wheat Cereal
Grain Farming in Northern California
The Benefits of Eating Whole Grains
The Benefits of Eating a High Fiber Breakfast Cereal