outerlayer
nounUK /ˈaʊtəˌleɪə/
US /ˈaʊtərˌleɪər/
The outerlayer is the outside part that covers something.
The outerlayer of the onion is dry and papery.
OTHER MEANINGS
2. The top layer of clothing worn over other clothes.
Wear a waterproof outerlayer when it rains.
3. The outermost layer of a planet or star.
The outerlayer of the Earth is called the crust.
4. The protective outside coat of a fruit or vegetable.
You can peel off the outerlayer of the orange before eating it.