General term for the main cereal crop of a region for example, wheat in the UK, oats in Scotland and Ireland, maize in the USA. Also, another word for maize Corn or maize is native to America but is now grown throughout the world. In grain form it is the staple diet for American Indians in Mexico, Peru and Southern North America. The Maori were given maize by American sailors which they grew and ate both fresh and fermented. The fermented corn was known as kaanga. Its strong smell didn't appeal to Pakeha who ate corn mainly as a grain. Eventually a sweet form was developed, and hence the name sweetcorn, it wasn't until the 1960's that sweetcorn became a really popular fresh vegetable. Several varieties are available including some with white kernels and others with a mix of yellow and white kernels. Varieties differ in sweetness. Recently the supersweet varieties have become popular, with Honey 'n' Pearl being the most widely grown. Sweetcorn is a very good source of fiber, protein and starch. corn is a great source of vitamin A, fiber, and other nutrients.