Fruit of the coconut tree. Coconut has a hard outer husk enclosing a large nut containing a white, edible, jelly-like substance called the “endosperm.”
Coconut can refer to the entire coconut palm, the seed, or the fruit, which, botanically, is a drupe, not a nut. Drupes are a fruit with a thin outer skin, soft pulpy middle, and hard stony central part that encloses a seed. Apricots, plums, cherries, and almonds are examples of drupes.