staple food

A staple food, sometimes simply referred to as a staple, is a food that is eaten routinely, and in such quantities that it constitutes a dominant portion of a standard diet in a given people, supplying a large fraction of the needs for energy-rich materials and generally a significant proportion of the intake of other nutrients as well. The staple food of a specific society may be eaten as often as every day, or every meal, and most people live on a diet based on just a small number of staples.