Pis forPeel
The outermost layer of fruit or vegetables is called the peel. Some fruits and vegetables have a soft peel that you can eat, but many have a hard or bitter peel. For most fruits and vegetables you use a peeler to remove the peel, but some fruits like bananas and mandarins have peels that are easy to remove with just your fingers.
You can peel anything that has a removable outer layer, not just food, but the term is most often used in relation to fruit and vegetables.