A nut can be defined as a one- seeded fruit. With that loose definition, a coconut can also be a nut. However, a coconut is not a true nut. A true nut, such as the acorn, are indehiscent or do not open at maturity to release its seeds.

Is coconut classed as a nut allergy?

If you have a nut allergy, you need to talk to your doctor about what foods to avoid. Even though coconut isn't a nut, some people who are allergic to tree nuts (like almonds, cashews, and walnuts) are also allergic to coconut.

Why is coconut not a nut?

The flesh and water is referred to as the endosperm. So what you typically know as a coconut is actually only the endocarp and endosperm part. And that part can be considered as a nut. One seed comes out of one coconut, and there's a hard shell, so a coconut can be considered a nut.