Yes, it is called a coconut, but the fruit of a coconut palm is technically not a nut. It is a drupe (also called stone fruit.) In botany, a drupe is any fruit consisting of an outer skin, a usually pulpy and succulent middle layer, and a hard and woody inner shell usually enclosing a single seed. Most palm fruits are drupes, including coconut, date, sabal and oil palms.) Other typical drupes include peaches, plums, olives, mangoes and cherries.