exocarp; epicarp
Botanical term for the outermost layer of a fruit's pericarp, such as the skin of a peach or the peel of an orange.
The exocarp of a peach is thin and edible.
The epicarp of a mandarin orange contains essential oils.
Compound of 外 (outside) + 果皮 (fruit skin). The term is a direct calque from Western botanical terminology.