1. staple food
Wikipedia definition
2. Staple foodA staple food is one that is eaten regularly and in such quantities that it constitutes a dominant portion of a diet, and that supplies a high proportion of energy and nutrient needs. Most people live on a diet based on at most a small number of staples. Staple foods vary from place to place, but are typically inexpensive or readily available foods that supply one or more of the three macronutrients needed for survival and health: carbohydrate, protein, and fat.
Read “Staple food” on English Wikipedia
Read “主食” on Japanese Wikipedia
Read “Staple food” on DBpedia


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