皮脂

1. Origins, structure, and basic meaning

• Structure: Written 皮脂 and read ひし, it is the oily substance secreted by sebaceous glands onto the skin surface.
• Basic usage: It is blotted from the forehead and located on a model by the place where it is secreted.

2. Common pitfalls and similar expressions

• Substance versus oily skin type
  • Sebum is the secretion itself; an oily skin type describes a tendency to produce more of it.