A cereal is a grass that contains a little fruit known as grains (caryopsis), with one seed inside (bran, germ, and endosperm). The wall of the fruit component is fused with the seed coating.
The word “cereal” is often used to describe a food group “cereal grains”, which includes the actual fruit itself (grain), that grows on these grasses, but also so called pseudo-cereals such as buckwheat, quinoa and amaranth. (1)
Cereal grains are used for several products such as breakfast cereals, pasta, noodles, tortillas, couscous, polenta, breads and any other products with flour of any of these cereal grains as the main ingredient.