Cereal grains refer to a group of grasses that produce edible seeds, which are commonly used as food for humans and animals. These include wheat, rice, corn, barley, oats, rye, sorghum, millet, and many others. The term "cereals" is often used interchangeably with "grains," but it specifically refers to the edible seeds of these grasses that are commonly used for breakfast foods such as flakes or puffed rice, cornflakes, oatmeal, etc., and not just limited to wheat.