Are nuts fruits or vegetables?
In terms of food groups, nuts are not considered fruits or vegetables. Nuts are in a group all by themselves. in the food guide pyramid, fruits are in a separate group and vegetables are in a group by itself. However, nuts are classified along with meats eggs and poultry group. In botanical terms, nuts are part of the fruit of various trees such as walnut, hazel, pecan etc. Many nuts are the fruit of a plant, and the rest are seeds, but they are all considered nuts as the above answer says.
A fruit is a botanical classification while a vegetable is a gastronomical one, so most fruits are vegetables and vice versa.
A nut is a specific type of fruit with a very hard exoshell. If nuts are used in cooking they can be considered vegetables insomuch as the context is culinary, but popular usage insists that we refer to them as nuts and not vegetables.
Peanuts are considered neither a fruit nor a vegetable. They are considered a nut and are part of the protein group in the food pyramid. All foods made from meat, poultry, fish, dry beans or peas, eggs, nuts, and seeds are considered part of the protein foods group.
Nuts are fruits – except when they’re not. “They are defined as dry, single-seeded fruits that have high oil content,” according to the U.S. Forest Service. “They are usually enclosed in a leathery or solid outer layer. In botany terms, nuts are strictly a particular kind of dry fruit that has a single seed, a hard shell, and a protective husk.”
Tree nuts such as chestnuts, hazelnuts, pecans and walnuts are the fruit of their trees. Almonds, for example, grow on trees of the same genus as those that give us fruits such as plums, apples, peaches and cherries. Despite this distinction, almonds are considered tree nuts and the almond industry is represented by the nonprofit International Tree Nut Council Nutrition Research & Education Foundation, along with eight others: Brazil nuts, cashews, hazelnuts, macadamias, pecans, pine nuts, pistachios and walnuts.
For the purpose of identifying the “tree nut” food allergen, the U.S. Food and Drug Administration categorizes the following as tree nuts: almond, beech nut, Brazil nut, butternut, cashew, chestnut (Chinese, American, European, Seguin), coconut, ginko nut, hickory nut, pecan, pine nut, pili nut, pistachio, shea nut, walnut (English, Persian, black, Japanese, California), heartnut and butternut.