noun
outer covering; protective coat; casing; jacket
Technical term for an outer protective layer or enclosure, used for cables, machinery, or biological structures.
このケーブルは外被が丈夫で、屋外でも使えます。
This cable has a durable outer jacket and can be used outdoors.
機械の外被を外して内部を点検した。
We removed the machine's casing and inspected the inside.