scurf

This term is primarily used in medical or technical contexts to describe flaky, scale-like debris. In a dermatological sense, it is often used interchangeably with dandruff, though scurf can refer to a broader range of skin conditions beyond just the scalp, such as those involving crusting or scaling due to irritation.

In industrial settings, the word shifts from biological tissue to metallic oxidation. It describes the rough, flaky residue that forms on the surface of metal during processes like smelting or welding, emphasizing a texture of brittle, peeling layers.