Corn

Corn is a tall annual cereal grass (Zea mays) that is widely grown for its large elongated ears of starchy seeds. The seeds, which are also known as corn, are used as food for humans and livestock and as a source of biofuel and can be processed into a wide range of useful chemicals.

While a small portion of “Field Corn” is processed for use as corn cereal, corn starch, corn oil and corn syrup for human consumption, it is primarily used for livestock feed, ethanol production and manufactured goods. It's considered a grain. Sweet corn is what people purchase fresh, frozen or canned for eating.