Question: is a peanut a nut?
Answer: Peanuts aren't actually a true nut; they're a legume (in the same family as peas and lentils). ... For this reason, people who are allergic to peanuts can also be allergic to tree nuts, such as almonds, Brazil nuts, walnuts, hazelnuts, macadamia nuts, pistachios, pecans, and cashews.