"Dietary staple" refers to a type of food or ingredient that is regularly consumed as a primary source of nutrition. It is something that people consume frequently and consider important for their daily diet. Full definition
In conclusion, tomatoes are a safe treat for healthy rabbits, but they should not serve as dietary staples. (petconsider.com)
The massive, abrupt switch to ethanol has caused severe economic damage to the impoverished who must now pay double for milk powder and beans, dietary staples of the poor. (dotearth.blogs.nytimes.com)
For health and happiness, your dog should vary the veggies that they consume, and those veggies should be used as supplementary foods and not dietary staples. (petconsider.com)