Botanically, most nuts are the seeds of a fruit, while true nuts — such as chestnuts, acorns, and hazelnuts — are fruits in and of themselves. Peanuts are the exception, as they're legumes — and thus technically vegetables.

Are nuts fruits?

Nuts are actually fruits. They are defined as dry, single-seeded fruits that have high oil content. 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.

Is a hazelnut a nut?

Tree nuts include almonds, Brazil nuts, cashews, hazelnuts, pecans, pistachios and walnuts. ... Nutmeg, water chestnut, butternut squash and shea nuts are not tree nuts (the term “nut” does not always indicate a tree nut) and are generally well tolerated by tree nut-allergic individuals.