表皮

1. Origins, structure, and basic meaning

• Structure: 表皮 is read as ひょうひ and can mean “epidermis” or “outer skin”, depending on context.
• Basic usage: The examples show an onion’s dry outer skin and the epidermis distinguished from dermis.

2. Common pitfalls and similar expressions

• Distinguishing senses and uses
  • It is the outermost covering layer; in skin anatomy it is the surface layer contrasted with inner 真皮.