millet: any of various small-grained annual cereal and forage grasses of the genera Panicum, Echinochloa, Setaria, Sorghum, and Eleusine
cereal: grass whose starchy grains are used as food: wheat; rice; rye; oats; maize; buckwheat; millet
mealworm: the larva of beetles of the family Tenebrionidae